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Questions and Answers
What is the reference number used in the multiplication example provided?
What is the reference number used in the multiplication example provided?
In the multiplication of 97 and 125, how much below the reference number is 97?
In the multiplication of 97 and 125, how much below the reference number is 97?
What is the sum obtained after adding 97 and 25 in the given multiplication method?
What is the sum obtained after adding 97 and 25 in the given multiplication method?
What mathematical operation is performed first after determining how much above or below the reference number each given number is?
What mathematical operation is performed first after determining how much above or below the reference number each given number is?
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What is the final result of multiplying 122 by the reference number 100?
What is the final result of multiplying 122 by the reference number 100?
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When determining how much above or below the reference number, which symbol is used for numbers above?
When determining how much above or below the reference number, which symbol is used for numbers above?
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After determining that 97 is below the reference number, which of the following describes that position?
After determining that 97 is below the reference number, which of the following describes that position?
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In the process of cross multiplication, what results from subtracting 3 from 125?
In the process of cross multiplication, what results from subtracting 3 from 125?
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What is the primary benefit of teaching multiplication tables, according to the author?
What is the primary benefit of teaching multiplication tables, according to the author?
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When multiplying numbers above the reference number, where do you draw the circles?
When multiplying numbers above the reference number, where do you draw the circles?
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In the example of multiplying 13 by 15, what mathematical operation is done after placing the circles?
In the example of multiplying 13 by 15, what mathematical operation is done after placing the circles?
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How is the number 13 represented when using 10 as a reference number?
How is the number 13 represented when using 10 as a reference number?
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What additional concepts do students learn while practicing their multiplication tables?
What additional concepts do students learn while practicing their multiplication tables?
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Why might some educators argue against teaching multiplication tables directly?
Why might some educators argue against teaching multiplication tables directly?
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What is represented by the numbers 3 and 5 in the context of multiplication in the teens?
What is represented by the numbers 3 and 5 in the context of multiplication in the teens?
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Which of the following methods is specifically mentioned as part of the multiplication technique in the teens?
Which of the following methods is specifically mentioned as part of the multiplication technique in the teens?
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What is the result of multiplying 96 by 96?
What is the result of multiplying 96 by 96?
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Which of the following pairs results in a product of 9,215?
Which of the following pairs results in a product of 9,215?
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Identify the product of 95 multiplied by 95.
Identify the product of 95 multiplied by 95.
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What is the correct result of multiplying 97 by 93?
What is the correct result of multiplying 97 by 93?
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What product results from multiplying 98 by 95?
What product results from multiplying 98 by 95?
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When multiplying 98 by 94, what is the expected product?
When multiplying 98 by 94, what is the expected product?
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Which calculation yields 9,016?
Which calculation yields 9,016?
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What is the result of 97 multiplied by 94?
What is the result of 97 multiplied by 94?
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What is the first step in the calculation of multiplying 34 by a factor of 20?
What is the first step in the calculation of multiplying 34 by a factor of 20?
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What is the subtotal obtained after multiplying 34 by 20 using the method described?
What is the subtotal obtained after multiplying 34 by 20 using the method described?
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How is the final answer of 713 obtained in the calculation?
How is the final answer of 713 obtained in the calculation?
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What are the substitute numbers to check the multiplication 23 × 31 using the casting out nines method?
What are the substitute numbers to check the multiplication 23 × 31 using the casting out nines method?
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What is the result of adding the digits of the product obtained from the substitute numbers 5 and 4?
What is the result of adding the digits of the product obtained from the substitute numbers 5 and 4?
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Which technique is suggested for multiplying numbers in the high teens?
Which technique is suggested for multiplying numbers in the high teens?
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Which of the following operations is performed to check if 713 is the correct answer using casting out the nines?
Which of the following operations is performed to check if 713 is the correct answer using casting out the nines?
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What final result should a student expect after performing the calculations for 23 × 27 based on the method described?
What final result should a student expect after performing the calculations for 23 × 27 based on the method described?
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What is the result of adding the numbers in the circles above for the multiplication problem 12 × 17?
What is the result of adding the numbers in the circles above for the multiplication problem 12 × 17?
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What is the subtotal obtained after multiplying 19 by the reference number 10 in the 12 × 17 problem?
What is the subtotal obtained after multiplying 19 by the reference number 10 in the 12 × 17 problem?
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When using the reference number method, what does a circle drawn below the reference number indicate?
When using the reference number method, what does a circle drawn below the reference number indicate?
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In the example with 10, 13 × 15, what is the final answer after adding the product of circled numbers to the subtotal?
In the example with 10, 13 × 15, what is the final answer after adding the product of circled numbers to the subtotal?
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How do you find the subtotal when the circled numbers are above the reference number?
How do you find the subtotal when the circled numbers are above the reference number?
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What mathematical operation is performed on the circled numbers when they are above the reference number?
What mathematical operation is performed on the circled numbers when they are above the reference number?
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What should be added to the final answer from the multiplication process, according to the methodology described?
What should be added to the final answer from the multiplication process, according to the methodology described?
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If the final multiplication involves numbers below the reference number, what action must be taken?
If the final multiplication involves numbers below the reference number, what action must be taken?
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What is the correct verbal representation of the answer when calculating 98 × 98 using a reference number?
What is the correct verbal representation of the answer when calculating 98 × 98 using a reference number?
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How do you compute the answer when using double multiplication for 92 times 94 without knowing 8 times 6?
How do you compute the answer when using double multiplication for 92 times 94 without knowing 8 times 6?
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If you follow the steps for calculating 96 × 96, which of the following results will you get?
If you follow the steps for calculating 96 × 96, which of the following results will you get?
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What is the primary method used to determine 96 in the context of multiplication with a reference number?
What is the primary method used to determine 96 in the context of multiplication with a reference number?
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When performing a calculation with reference numbers, what is the result of 2 times 2?
When performing a calculation with reference numbers, what is the result of 2 times 2?
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In the context of the calculations described, what is the result of 98 × 97?
In the context of the calculations described, what is the result of 98 × 97?
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What two numbers are filled in the circles when calculating 92 times 94 using double multiplication?
What two numbers are filled in the circles when calculating 92 times 94 using double multiplication?
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What method is suggested for subtracting when calculating 92 × 94?
What method is suggested for subtracting when calculating 92 × 94?
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Flashcards
Double Multiplication Method
Double Multiplication Method
A method for multiplying two numbers close to 100. It involves subtracting differences from 100 and then adding the product of the differences.
Reference Number
Reference Number
A base number, often 100, used in a shortcut multiplication method for numbers close to this base. This helps in calculating the answer faster.
Difference from 100
Difference from 100
The numerical gap between the given number and the reference number 100.
Subtract Crossways
Subtract Crossways
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Product of Differences
Product of Differences
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98 x 98
98 x 98
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96 x 96
96 x 96
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Mental Calculation Shortcut
Mental Calculation Shortcut
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Multiplication of 90s
Multiplication of 90s
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Reference number
Reference number
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96 x 96 calculation
96 x 96 calculation
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Speed Math Method
Speed Math Method
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Mental Calculation
Mental Calculation
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Example Calculation (98 x 94)
Example Calculation (98 x 94)
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Calculation strategy (96 x 94)
Calculation strategy (96 x 94)
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First Grade Example
First Grade Example
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Multiplication Tables
Multiplication Tables
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Reference Number
Reference Number
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Multiplying Teens
Multiplying Teens
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Example of multiplication
Example of multiplication
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Method for Teens products
Method for Teens products
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Calculating Crossways
Calculating Crossways
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Multiplication approach
Multiplication approach
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Basic Number Facts
Basic Number Facts
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Multiplying above and below 100
Multiplying above and below 100
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Reference Number
Reference Number
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Difference from 100
Difference from 100
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Crossways Calculation
Crossways Calculation
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97 x 125 calculation
97 x 125 calculation
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Numbers Above/Below 100
Numbers Above/Below 100
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Calculate 122 X 100
Calculate 122 X 100
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Shortcut Multiplication
Shortcut Multiplication
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Multiplying numbers close to 10
Multiplying numbers close to 10
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Reference number in multiplication
Reference number in multiplication
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Numbers above/below reference number
Numbers above/below reference number
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Subtotal calculation
Subtotal calculation
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Diagonal Addition/Subtraction
Diagonal Addition/Subtraction
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Final answer calculation
Final answer calculation
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Example: 12 x 17
Example: 12 x 17
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Example: 10's as reference
Example: 10's as reference
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Multiplying 3-digit numbers
Multiplying 3-digit numbers
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Casting out nines
Casting out nines
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Multiplication reference number
Multiplication reference number
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Multiplication of Teens
Multiplication of Teens
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Sub-total
Sub-total
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Multiplication method
Multiplication method
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Multiplication calculation
Multiplication calculation
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Multiplication by reference
Multiplication by reference
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Study Notes
Speed Math for Kids
- Book by Bill Handley
- Published by John Wiley & Sons, Inc. (2007)
- Aims to teach basic calculations quickly and fun for kids.
- Includes various mathematical methods and applications.
- Provides methods for addition, subtraction, multiplication, and division.
- Explains the use of reference numbers.
- Includes practice sheets for learners.
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