Year 1 Ten More, Ten Less (and One More, One Less) Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 1 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 1 · Mathematics · Place ValueYear 1 Ten More, Ten Less (and One More, One Less) Worksheet — Level 1 — Practice Set 3 — Answers
Use place value: ten more or ten less changes the tens digit.
1.One less than 43 is (answer space).
Answer: 42
- 43 − 1 = 42
2.One less than 28 is (answer space).
Answer: 27
- 28 − 1 = 27
3.Ten more than 71 is (answer space).
Answer: 81
- 71 + 10 = 81
4.One more than 63 is (answer space).
Answer: 64
- 63 + 1 = 64
5.One more than 49 is (answer space).
Answer: 50
- 49 + 1 = 50
6.One more than 7 is (answer space).
Answer: 8
- 7 + 1 = 8
7.Ten less than 15 is (answer space).
Answer: 5
- 15 − 10 = 5
8.Ten more than 76 is (answer space).
Answer: 86
- 76 + 10 = 86
9.Ten less than 79 is (answer space).
Answer: 69
- 79 − 10 = 69
10.One more than 55 is (answer space).
Answer: 56
- 55 + 1 = 56
11.One more than 59 is (answer space).
Answer: 60
- 59 + 1 = 60
12.Ten less than 40 is (answer space).
Answer: 30
- 40 − 10 = 30
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.