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Multiply x * . () by ten:
10 groups of or 10 lots of
Answer ends in 0
Add a zero to the right of the number
Skip count in 10s
Learn your 10 times tables
Divide ÷ / by ten:
How many times does 10 go into
Break into 10 groups
One tenth
Take a zero from the number if it ends in 0
Reverse 10x tables 3x10=30 so 30÷10=3 and 30÷3=10
Add + ten:
Add one to the tens digit
Take - ten:
Take one from the tens digit
Know your bonded pairs 8+2=10 so 10-2=8 and 10-8=2
Number in grey (left) x number in grey (top) = number in white OR number in white ÷ number in grey = other number in grey.
| x | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 |
Number in grey (left) + number in grey (top) = number in white OR number in white - number in grey = other number in grey.
| + | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
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