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- Level 1
- Numbers from 0 to 9
- Level 2
- One number from 0 to 9, the other from 0 to 20
- Level 3
- Numbers from 0 to 20
- Level 4
- One number from 0 to 20, the other from 11 to 99
- Level 5
- Numbers from 11 to 99
- Level 6
- One number from 11 to 99, the other from 101 to 999
- Level 7
- Numbers from 101 to 999

There are no negative results at any level

- Level 1
- Numbers from 0 to 9
- Level 2
- Minuend from 1 to 20, subtrahend from 0 to 9
- Level 3
- Numbers from 0 to 20
- Level 4
- Minuend from 11 to 99, subtrahend from 0 to 20
- Level 5
- Numbers from 11 to 99
- Level 6
- Minuend from 101 to 999, subtrahend from 11 to 99
- Level 7
- Numbers from 101 to 999

- Level 1
- Numbers from 0 to 5
- Level 2
- One number from 0 to 5, the other from 1 to 10
- Level 3
- Numbers from 0 to 10
- Level 4
- One number from 0 to 10, the other from 2 to 20
- Level 5
- Numbers from 2 to 20
- Level 6
- One number from 2 to 20, the other from 3 to 100
- Level 7
- Numbers from 3 to 100

There are no remainders at any level

- Level 1
- Dividend from 0 to 25, divisor from 1 to 5
- Level 2
- Dividend from 0 to 50, divisor from 1 to 5
- Level 3
- Dividend from 0 to 100, divisor from 1 to 10
- Level 4
- Dividend from 0 to 200, divisor from 1 to 10
- Level 5
- Dividend from 4 to 400, divisor from 2 to 20
- Level 6
- Dividend from 6 to 2000, divisor from 3 to 20
- Level 7
- Dividend from 9 to 10,000 and divisor from 3 to 100

- Level 1
- Numbers from 0 to 9
- Level 2
- One number from 0 to 9, the other from 0 to 20
- Level 3
- Numbers from 0 to 20
- Level 4
- One number from 0 to 20, the other from 11 to 99
- Level 5
- Numbers from 11 to 99
- Level 6
- One number from 11 to 99, the other from 101 to 999
- Level 7
- Numbers from 101 to 999