Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
8. An Introduction to Equations
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Exercise 31 Page 56

What number can we add to 18 to get 24?

d=6

Practice makes perfect
To solve this equation using mental math we want to think about what it means in words. Let's rewrite the given equation as a sentence.

18 + d=24 Adding a number to 18equals24. What number can we add to 18 to get 24? We add 6.