Year 1 Ten More, Ten Less (and One More, One Less) Worksheet — Level 1 — Practice Set 4 — 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 4 — Answers
Use place value: ten more or ten less changes the tens digit.
1.One less than 23 is (answer space).
Answer: 22
- 23 − 1 = 22
2.Ten more than 5 is (answer space).
Answer: 15
- 5 + 10 = 15
3.Ten less than 59 is (answer space).
Answer: 49
- 59 − 10 = 49
4.Ten more than 13 is (answer space).
Answer: 23
- 13 + 10 = 23
5.Ten more than 21 is (answer space).
Answer: 31
- 21 + 10 = 31
6.One less than 76 is (answer space).
Answer: 75
- 76 − 1 = 75
7.One less than 85 is (answer space).
Answer: 84
- 85 − 1 = 84
8.Ten less than 23 is (answer space).
Answer: 13
- 23 − 10 = 13
9.One less than 35 is (answer space).
Answer: 34
- 35 − 1 = 34
10.Ten more than 67 is (answer space).
Answer: 77
- 67 + 10 = 77
11.One less than 64 is (answer space).
Answer: 63
- 64 − 1 = 63
12.Ten less than 90 is (answer space).
Answer: 80
- 90 − 10 = 80
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.