Sample questions
1.9 + = 19
2.13 + = 15
3.3 + = 12
4.4 + = 17
5.6 + = 20
6.5 + = 14
7.5 + = 10
8.13 + = 20
Missing number sums (up to 20) worksheets for Grade 1
Find the missing number that makes the sum true.
- Grade 1, ages 6–7 (USA)
- Topic: Addition and subtraction
- Easy, medium and hard levels, with fresh questions every time
- Printable PDF with an answer key, or practise online with instant marking