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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Multiplying Integers
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Exercise 37 Page 53

Pay close attention to the order of operations.

54

Practice makes perfect
According to the order of operations, expressions inside parentheses are evaluated first, followed by exponents, then multiplication and division, and finally addition and subtraction are evaluated last. We can use the acronym PEMDAS to help us remember the correct order!
pemdas

For the given expression, we can first evaluate the exponent expression before finding the product - 2* (- 3)^3 Let's do it! Keep in mind that when we multiply two negative numbers, we get a positive number.

Operation Before Simplification After Simplification
Calculate Power - 2* (- 3)^3 - 2* ( - 27)
Multiply - 2* ( - 27) 54
The expression is equal to 54.

Alternative Solution

 Using a Calculator

We can also evaluate this expression using a calculator. To do so, we type it as shown below.

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arrow_right Self-Assessment for Problem Solving p.52
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