Year 1 Ten More, Ten Less (and One More, One Less) Worksheet — Getting Started — 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 — Getting Started — Practice Set 3 — Answers
Use place value: ten more or ten less changes the tens digit.
1.One less than 9 is (answer space).
Answer: 8
- 9 − 1 = 8
2.One less than 2 is (answer space).
Answer: 1
- 2 − 1 = 1
3.One more than 3 is (answer space).
Answer: 4
- 3 + 1 = 4
4.One less than 13 is (answer space).
Answer: 12
- 13 − 1 = 12
5.One less than 5 is (answer space).
Answer: 4
- 5 − 1 = 4
6.One more than 6 is (answer space).
Answer: 7
- 6 + 1 = 7
7.One more than 13 is (answer space).
Answer: 14
- 13 + 1 = 14
8.One less than 16 is (answer space).
Answer: 15
- 16 − 1 = 15
9.One more than 12 is (answer space).
Answer: 13
- 12 + 1 = 13
10.One more than 17 is (answer space).
Answer: 18
- 17 + 1 = 18
11.One less than 6 is (answer space).
Answer: 5
- 6 − 1 = 5
12.One more than 10 is (answer space).
Answer: 11
- 10 + 1 = 11
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.