Ten more, ten less

Grade 1 · Level 3 · Sheet 1

Scan to check
the answers

Name Date

Free from tutor.in4me.app · 1.NBT.C.5, 1.NBT.A.1 · Five minutes a day online, and the difficulty follows your child.

1.
What is 10 less than 38?
38
Answer:
2.
What is 1 less than 21?
21
Answer:
3.
What is 10 less than 88?
88
Answer:
4.
What is 1 more than 47?
47
Answer:
5.
What is 1 more than 19?
19
Answer:
6.
What is 1 less than 28?
28
Answer:
7.
What is 1 less than 75?
75
Answer:
8.
What is 1 less than 99?
99
Answer:
9.
What is 1 more than 39?
39
Answer:
10.
What is 10 less than 18?
18
Answer:
11.
What is 10 more than 61?
61
Answer:
12.
What is 10 less than 82?
82
Answer:

Show the answer key

1.28
2.20
3.78
4.48
5.20
6.27
7.74
8.98
9.40
10.8
11.71
12.72

The mistakes behind most wrong answers

A wrong answer in ten more, ten less is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.

What is 10 less than 86?
86
The answer is 76. A child who answers 86 probably started counting from the wrong number.
What is 1 less than 72?
72
The answer is 71. A child who answers 73 probably added instead of taking away.
What is 1 more than 44?
44
The answer is 45. A child who answers 43 probably took away instead of adding.
What is 10 less than 34?
34
The answer is 24. A child who answers 33 probably lost track of the ten.

In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.

Answer key · Ten more, ten less · Level 3 · Sheet 1

The mistakes behind most wrong answers