Lesson Worksheet: Adding by Counting On: Numbers up to 20 Mathematics • 1st Grade

In this worksheet, we will practice adding within 20 by counting on from one of the numbers.

Q1:

To find 8 plus 4, we can start at 8 and count forward 4.

Finish counting forward to find the answer to 8 plus 4.

Q2:

Mia put her counter on 11 then moved it forward 3 spaces.

Help Mia to find the missing number.

Q3:

Find the answer to the following:

Q4:

Sophia holds up 3 fingers and starts counting up, putting up one finger at a time. She stops when she is holding up 8 fingers.

Was she adding or subtracting?

  • Asubtracting
  • Badding

Pick the number sentence that matches what she did.

  • A3+5=8
  • B85=3

Q5:

Fill in the blank: 8+3=.

Q6:

There are 15 footballs in the box. I am going to put 2 more footballs into the box.

Count on from 15 to find out how many footballs will be in the box.

Q7:

Complete the missing values in the figure from left to right.

  • A17, 18, 19
  • B16, 17, 18
  • C15, 16, 17

Q8:

Find the missing number to make the equation correct.

Q9:

This is a game board.

Scarlett’s pawn is on number 11. Scarlett moves her pawn by 8 forward. Which number does Scarlett’s pawn land on?

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