Counting in twos, fives and tens
Grade 1 · Level 1 · Sheet 1the answers
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- 1.
Count by 10s. What is missing?
506070? - 2.
Count by 10s. What is missing?
3040?60 - 3.
Count by 10s. What is missing?
405060? - 4.
Count by 10s. What is missing?
10?3040 - 5.
Count by 10s. What is missing?
70?90100 - 6.
Count by 10s. What is missing?
2030?50 - 7.
Count by 10s. What is missing?
607080? - 8.
Count by 10s. What is missing?
4050?70 - 9.
Count by 10s. What is missing?
30?5060 - 10.
Count by 10s. What is missing?
30?5060 - 11.
Count by 10s. What is missing?
70?90100 - 12.
Count by 10s. What is missing?
1020?40
Show the answer key
- 1.80
- 2.50
- 3.70
- 4.20
- 5.80
- 6.40
- 7.90
- 8.60
- 9.40
- 10.40
- 11.80
- 12.30
Answer key · Counting in twos, fives and tens · Level 1 · Sheet 1
- 1.80
- 2.50
- 3.70
- 4.20
- 5.80
- 6.40
- 7.90
- 8.60
- 9.40
- 10.40
- 11.80
- 12.30
The mistakes behind most wrong answers
A wrong answer in counting in twos, fives and tens 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.
Count by 10s. What is missing?
708090?The answer is 100. A child who answers 91 probably counted one too many or too few.
Count by 10s. What is missing?
20?4050The answer is 30. A child who answers 40 probably counted the last one twice.
Count by 10s. What is missing?
304050?The answer is 60. A child who answers 30 probably started counting from the wrong number.
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.