Worksheet: Horizontal Addition within 100

In this worksheet, we will practice solving horizontal addition sentences within 100 by thinking about place value and using place value blocks, cards, or ten frames.

Q1:

We can use what we know about place value to add two-digit numbers quickly.

1 4 + 2 5 =

Find the answer by adding the tens together and then the ones.

Q2:

Use the picture to help you complete the number sentence: 5 2 + 3 2 = .

Q3:

Which of the following matches the sum shown with the place value blocks?

  • A 6 0 + 6
  • B 1 3 + 4 6
  • C 2 3 + 4 6

Q4:

Which frame matches 3 7 + 1 2 ?

  • A
  • B
  • C

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