Podcast
Questions and Answers
What are math problems expressed in words and sentences called?
What are math problems expressed in words and sentences called?
Which of the following phrases indicates a subtraction operation in word problems?
Which of the following phrases indicates a subtraction operation in word problems?
What is the process in subtraction where a place value borrows from the place value to the left in order to subtract?
What is the process in subtraction where a place value borrows from the place value to the left in order to subtract?
In the problem 252 - 146, what needs to happen to the ones place during subtraction?
In the problem 252 - 146, what needs to happen to the ones place during subtraction?
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Which of the following is NOT a common signal for subtraction in word problems?
Which of the following is NOT a common signal for subtraction in word problems?
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What is the sum of 11 and 13 in Example 1?
What is the sum of 11 and 13 in Example 1?
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Which signal word indicates a subtraction problem in Example 2?
Which signal word indicates a subtraction problem in Example 2?
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How should the subtraction problem in the Challenge Example be set up?
How should the subtraction problem in the Challenge Example be set up?
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What is the minuend in the subtraction problem of the Challenge Example?
What is the minuend in the subtraction problem of the Challenge Example?
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In which step of solving addition and subtraction word problems is regrouping most likely to occur?
In which step of solving addition and subtraction word problems is regrouping most likely to occur?
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Study Notes
Types of Math Problems
- Math problems can be written in words and sentences, known as word problems
- Word problems can be translated into algebraic expressions to be solved mathematically
Subtraction Word Problems
- Subtraction word problems involve math problems written in words and sentences that indicate subtraction
- Signal words that indicate subtraction include less, reduced by, difference, remain, fewer, and take away
- Regrouping (or borrowing) may be necessary when subtracting 2-digit or larger numbers
Subtraction with Regrouping
- Regrouping is the process of borrowing from the place value to the left to subtract
- Regrouping may occur over multiple columns
Addition Word Problems
- Addition word problems involve math problems written in words and sentences that indicate addition
- Signal words that indicate addition include more, increased by, sum, plus, altogether, total, and combined
Common Signal Words
- Table identifying addition and subtraction signal words: • Addition: more, increased by, sum, plus, altogether, total, combined • Subtraction: less, reduced by, difference, remain, fewer, take away
Solving Word Problems
- Step 1: Identify signal words to determine if the problem involves addition or subtraction
- Step 2: Determine minuend, subtrahend, and difference (for subtraction), or addends and sum (for addition)
- Step 3: Write values in numeric form with addition or subtraction and equal symbols
- Step 4: Solve the problem to calculate the unknown value
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Description
Test your understanding of subtraction word problems expressed in sentences and how to translate them into algebraic expressions for mathematical solutions.
