Inverse Operations: Check Your Answers (Ex. 3)

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1. Question 1

   Multiple choice

   I add 50 to a number and get 120. What was the number?

2. Question 2

   Multiple choice

   280 - 135 = ___.

3. Question 3

   Multiple choice

   Which shows an inverse pair?

4. Question 4

   Sequence

   200+100=300, 300-100=200; 400+150=550, 550-150=___.

5. Question 5

   True or false

   Adding and subtracting the same number always returns you to where you started.

More exercises in this module

• Inverse Operations: Check Your Answers (Ex. 2)

• Estimating Sums and Differences (Ex. 2)

• Word Problems: Addition and Subtraction (Ex. 3)

• Mental Addition and Subtraction (Ex. 1)

• Word Problems: Addition and Subtraction (Ex. 2)

• Estimating Sums and Differences (Ex. 1)