1st Grade Ten More, Ten Less (and One More, One Less) Worksheet — Getting Started — Practice Set 3 — Answers
Answer sheet with worked solutions for the 1st Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet1st Grade · Mathematics · Place Value1st Grade 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 19 is (answer space).
Answer: 18
- 19 − 1 = 18
2.One less than 8 is (answer space).
Answer: 7
- 8 − 1 = 7
3.One less than 18 is (answer space).
Answer: 17
- 18 − 1 = 17
4.One less than 3 is (answer space).
Answer: 2
- 3 − 1 = 2
5.One less than 13 is (answer space).
Answer: 12
- 13 − 1 = 12
6.One more than 4 is (answer space).
Answer: 5
- 4 + 1 = 5
7.One more than 12 is (answer space).
Answer: 13
- 12 + 1 = 13
8.One less than 6 is (answer space).
Answer: 5
- 6 − 1 = 5
9.One more than 16 is (answer space).
Answer: 17
- 16 + 1 = 17
10.One more than 1 is (answer space).
Answer: 2
- 1 + 1 = 2
11.One less than 17 is (answer space).
Answer: 16
- 17 − 1 = 16
12.One more than 13 is (answer space).
Answer: 14
- 13 + 1 = 14
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.