Subtraction Within 100
- Qs
- 6
- Marks
- 6
NameDateScore / 6
1.[1]
10 − 5 =
2.[1]
6 − 3 =
3.[1]
7 − 5 =
4.[1]
3 − 1 =
5.[1]
6 − 2 =
6.[1]
2 − 1 =
Answer key
- 510 − 5 = 5
- 36 − 3 = 3
- 27 − 5 = 2
- 23 − 1 = 2
- 46 − 2 = 4
- 12 − 1 = 1
Subtraction Within 100: Year 1 maths
This topic covers subtracting one- and two-digit numbers from numbers up to 100, focusing on counting back and partitioning. Pupils develop accuracy with mental subtraction both with and without crossing a ten boundary.
What this covers
Subtraction Within 100 is taught in Year 1 (age 6 to 7) as a topic to introduce. It sits in the Number strand.
Worked example
Calculate: 62 - 27
- Partition 27 into 20 and 7.
- Subtract the tens: 62 - 20 = 42.
- Subtract the remaining ones: 42 - 7 = 35.
Answer: 35
Difficulty scale
The sheet generator offers five difficulty settings for this topic.
- Subtracting a 1-digit number from a 2-digit number without crossing ten (e.g., 48 - 5)
- Subtracting a 1-digit number crossing ten (e.g., 43 - 7)
- Subtracting multiples of 10 from any 2-digit number (e.g., 74 - 30)
- Subtracting two 2-digit numbers without borrowing (e.g., 58 - 23)
- Subtracting two 2-digit numbers with borrowing across ten (e.g., 71 - 38)
Common mistakes
- Subtracting the smaller digit from the larger digit regardless of position (e.g., 52 - 17 -> 2 - 7 becomes 7 - 2 = 5)
- Counting back incorrectly across the decade boundary
Curriculum links
Indicative matches to Australian Curriculum v9. Check wording and codes against the official document.
- AC9M1N04 Solve simple addition and subtraction problems using mental and written strategies within 100.
Sample sheet and answers
Six questions at the level's usual difficulty. Open the editor to change, add or regenerate any of them.