Bridging ten
Jump to the next ten first, then add what is left.
Flashcard deck
Subtraction facts to 20
The tricky subtraction facts within 20, shown as jumps back on a number line through 10.
Ages 6–949 cards
Try three cards
Tap a card to turn it over and see why.
10 − 5
10 − 5 = 5Count back 5 from 10 and you land on 5.
12 − 8
12 − 8 = 412 − 2 takes you to 10, then 6 more back is 4.
15 − 8
15 − 8 = 715 − 5 takes you to 10, then 3 more back is 7.
Practising saves your boxes so each card comes back at the right time. You need a free account.
Start practisingAll 49 facts in this deck
- 6 − 3 = 3
- 7 − 3 = 4
- 7 − 4 = 3
- 8 − 3 = 5
- 8 − 4 = 4
- 8 − 5 = 3
- 9 − 3 = 6
- 9 − 4 = 5
- 9 − 5 = 4
- 9 − 6 = 3
- 10 − 3 = 7
- 10 − 4 = 6
- 10 − 5 = 5
- 10 − 6 = 4
- 10 − 7 = 3
- 11 − 3 = 8
- 11 − 4 = 7
- 11 − 5 = 6
- 11 − 6 = 5
- 11 − 7 = 4
- 11 − 8 = 3
- 12 − 3 = 9
- 12 − 4 = 8
- 12 − 5 = 7
- 12 − 6 = 6
- 12 − 7 = 5
- 12 − 8 = 4
- 12 − 9 = 3
- 13 − 4 = 9
- 13 − 5 = 8
- 13 − 6 = 7
- 13 − 7 = 6
- 13 − 8 = 5
- 13 − 9 = 4
- 14 − 5 = 9
- 14 − 6 = 8
- 14 − 7 = 7
- 14 − 8 = 6
- 14 − 9 = 5
- 15 − 6 = 9
- 15 − 7 = 8
- 15 − 8 = 7
- 15 − 9 = 6
- 16 − 7 = 9
- 16 − 8 = 8
- 16 − 9 = 7
- 17 − 8 = 9
- 17 − 9 = 8
- 18 − 9 = 9
Number Line Frog
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Subtraction
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