About this worksheet
Sixteen number sentences, each with a box for the missing number. In twelve of them the box is one of the addends (23 + ? = 48), and in four it is the sum.
Finding a missing addend is subtraction in disguise: 48 take away 23. Counting up from 23 to 48 works just as well and is often easier. None of the problems need regrouping, so the focus stays on the thinking.
What students will practice
- Find a missing addend within 100
- Use counting up or subtraction to solve
- Complete number sentences
Details
- Grade level
- Grade 2
- Subject
- Math · Addition
- Standard
- CCSS 2.NBT.B.5
- Pages
- 1
- Format
- PDF · US Letter and A4 included
- License
- Free for classroom use · Attribution appreciated
- Last updated
- October 13, 2026
