Worksheet: Adding Numbers up to 100 Using Compensation

In this worksheet, we will practice adding two numbers by breaking them apart and combining them to give us numbers that are easier to add.

Q1:

We can find easier sums to help us add.

Find the missing number.

What is 54+18?

Q2:

Match the calculations which have the same answer.

Hint: What happens when you subtract the green ones from one addend and add them to the other?

  • A
  • B
  • C

Q3:

Think about adding 47 and 15.

Pick a calculation that has the same answer.

  • A
  • B
  • C
  • D

Find the answer.

Q4:

Benjamin showed that 38+13 is the same as 40+11 by taking 2 ones from 13 and adding them to 38.

What is 38+13?

Pick another calculation that has the same answer as 38+13.

Hint: Take 3 ones from 13.

  • A41+10
  • B40+10
  • C42+10
  • D41+13

Q5:

Help Amelia find 17+14.

Amelia moves 3 ones. What sum has she made?

  • A14+11
  • B20+14
  • C20+11
  • D17+11

What is 17+14?

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