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  • 1st Grade
  • Math
  • About 10 minutes

Hop Back to 20

Start at the first number. Hop back one space at a time. Where do you land?

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Hop Back to 20Name:Date:Start at the first number. Hop back one space at a time. Where do you land?EXAMPLE0123456789101112131415161718192014−3=11LOOK AT THE HOPS0123456789101112131415161718192013−6=0123456789101112131415161718192017−4=0123456789101112131415161718192020−8=0123456789101112131415161718192020−9=0123456789101112131415161718192015−9=k5printables.com · Sheet #11824601 · Aligned with Common Core 1.OA.C.6

This is sheet #11824601.

How to do it

  1. Put your finger on the first number.
  2. Hop back one space at a time.
  3. Where you land is the answer.

Teaching tip

Say "start" on the first number and count only the hops. This sheet is aligned with Common Core 1.OA.C.6.

Hop Back to 20 worksheet for 1st grade (subtraction within 20), free printable
Printable preview

About this worksheet

A 0 to 20 number line for each problem. Start on the big number and hop back.

What kids practice

Subtraction within 20 means taking away from a number that is 20 or less, like 15 - 7. These facts are harder than the ones within 10 because kids can't see them on two hands. Ten frames, number lines and addition facts they already know are what make them easy.

Watch for

  • Counting the starting number as the first hop, which gives an answer one too small.
  • Taking the smaller ones digit from the bigger one (13 - 5 becomes 12, because 5 - 3 = 2).
  • Losing track while counting back a long way. Counting up from the small number is usually shorter.

It's free to print, with Fewer, Standard or More on the page and an answer key. See the full subtraction within 20 guide for 1st grade.

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