Missing numbers in addition within 20 worksheet
Start at the number you know and count up to the total. Write how many steps you took.
Name ________________________Date ______________
Worked example · Count from 9 to 13
Find the missing number in 9 + ___ = 13.
Start at 9. Count the jumps to 10, 11, 12 and 13.
Four jumps give 9 + 4 = 13.
Practice questions
- 5 + ___ = 12
- ___ + 8 = 16
- 11 + ___ = 14
- ___ + 6 = 19
- 17 + ___ = 20
- There are 9 children in a group. Some more join and now there are 15. How many joined?