Podcast
Questions and Answers
Which property of addition is represented by the equation (6 + 2) + 10 = 6 + (2 + 10)?
Which property of addition is represented by the equation (6 + 2) + 10 = 6 + (2 + 10)?
Which property of addition is represented by the equation 13 + 12 = 12 + 13?
Which property of addition is represented by the equation 13 + 12 = 12 + 13?
Which property of addition is shown in the equation 858 + 0 = 858?
Which property of addition is shown in the equation 858 + 0 = 858?
Fill in the blank: 10 + 52, 52 + 10 = ___
Fill in the blank: 10 + 52, 52 + 10 = ___
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Fill in the blank: 2 + (3 + 5) = (2 + 3) + ___
Fill in the blank: 2 + (3 + 5) = (2 + 3) + ___
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What is the estimated sum of 1,837 and 4,349 when rounded to the nearest ten?
What is the estimated sum of 1,837 and 4,349 when rounded to the nearest ten?
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What is the estimated sum of 4,859 and 4,585 when rounded to the nearest hundred?
What is the estimated sum of 4,859 and 4,585 when rounded to the nearest hundred?
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How much money did the Animal Shelter receive in total on Monday and Tuesday?
How much money did the Animal Shelter receive in total on Monday and Tuesday?
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Estimate the difference of 5,264 - 1,847 by rounding each number to the nearest ten. What is the estimated difference?
Estimate the difference of 5,264 - 1,847 by rounding each number to the nearest ten. What is the estimated difference?
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Study Notes
2nd Quarterly Exam Reviewer - Mathematics 3
- Math Prayer: A prayer focusing on multiplying grace, subtracting sins, adding wisdom and understanding, and sharing blessings with others.
Second Quarter Topics
- Properties of Addition: Concepts related to addition are reviewed.
- Addition (Actual and Estimated Sum): Actual sums and estimated sums area covered.
- Mental Addition: Mental math strategies for addition are discussed.
- Addition Word Problems: Real-world addition problems.
- Subtraction (Actual and Estimated Difference): Actual differences and estimated differences.
- Mental Subtraction: Mental math strategies for subtraction.
- Subtraction Word Problems: Real-world subtraction problems.
- Two-step Word Problems involving Addition and Subtraction: Word problems requiring two steps for both addtion and subtraction.
Addition
- Addition Sentence: Demonstrates the parts of an addition sentence (addends, plus sign, equal sign, sum). Includes illustration of specific elements in an equation.
Properties of Addition
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Commutative Property of Addition: The order of addends does not change the sum.
- Example: 7 + 8 = 8 + 7
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Associative Property of Addition: The grouping of addends does not change the sum.
- Example: (7 + 8) + 4 = 7 + (8 + 4)
-
Identity Property of Addition: Adding zero to any number results in the original number.
- Example: 45 + 0 = 45
Identifying Properties of Addition
- Practice identifying the operations.
- (6+2)+10=6+(2+10) => Associative
- 13+12=12+13 => Commutative
- 858+0=858 => Identity
Filling in Blanks with Missing Numbers
- Practice applying properties in equations.
- 52+10=10+52
- 2+(3+5)=(2+3)+5 => Associative
- 125+0=125 => Identity
Addition Within 10 000
- Estimated Sums:
- Rounding to nearest ten or hundred before adding to estimate.
- Example: Rounding for estimate sum is shown in examples
- Rounding to nearest ten or hundred before adding to estimate.
Subtraction
- Subtraction Sentence: Includes the parts (minuend, subtrahend, minus sign, equal sign, difference).
Solving for Actual and Estimated Differences
- Rounding to the nearest ten or hundred before subtracting to estimate.
- Demonstrated in examples included.
Mental Subtraction
- Practice mentally subtracting various numbers.
- Examples included to demonstrate the technique include: 97 - 45 = 52, 100 - 37 = 63, 89 - 32 = 57, 81 - 46 = 35, 500 - 451 = 49.
Subtraction Word Problems
-
Solving Steps:
- Read and analyze the word problem
- Draw and label the bar model
- Write the subtraction sentence
- Write the solution and the complete answer.
Two-Step Word Problems Involving Addition and Subtraction
- Examples are presented that have addition and subtraction in a combined operation process.
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Description
This quiz covers key topics from the second quarter of Mathematics 3, including properties of addition and subtraction, mental strategies, and real-world applications through word problems. Review essential concepts to prepare for your upcoming exam effectively.
