Worksheet: Subtracting by Counting Back: Numbers up to 20

In this worksheet, we will practice subtracting within 20 by counting back from the starting number.

Q1:

On this domino, the dots on one side are covered with a sticker, and the total number of dots is written above it.

How many dots are under the sticker on this domino?

Q2:

Michael holds up 9 fingers and starts counting down as he puts down one finger at a time. He stops when he is holding up 4 fingers.

Decide whether he was adding or subtracting by picking the number sentence that describes what he did.

  • A 5 + 4 = 9
  • B 9 5 = 4
  • C 9 + 4 = 1 3

Q3:

Isabella put her counter on 12 then moved it back 2 spaces.

Help her find the missing number:

Q4:

This is a subtraction machine.

It subtracts 3 from any number you put in.

What number will come out if you put 8 in?

What number will come out if you put 11 in?

What number will come out if you put 19 in?

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