Worksheet directions

Grade 1 • Review • Choose a strategy for each problem. Explain or check your thinking where requested.

Sample questions

1. A student says 45 + 18 = 53. Correct the answer. Correct answer: ___
2. Solve 64 - 20. 64 - 20 = ___
3. Solve 52 - 18. 52 - 18 = ___
4. Is 38 + 21 closer to 50 or 60? Closer to: ___
5. Show why 32 + 9 can become 32 + 8 + 1. Answer: ___
6. A box has 26 crayons. 18 more are added. How many now? 26 + 18 = ___

See the preview for diagrams, answer spaces, and the complete layout.

Common Core connections

Source labels: 1.NBT.C.4–6. Review the learning goals below to check the fit for your class.

• 1.NBT.C.4 — Add within 100
• 1.NBT.C.5 — Mentally find 10 more or 10 less
• 1.NBT.C.6 — Subtract multiples of 10

Bring it into your lesson

Review the preview and question content above. Open the resource in Sparkclass to copy it to your Files and use it in your workspace. Check the resulting layout before sharing it with students.