The tricky ones
There are few mistakes here; the main one is reading 10 × 10 as 1,000. Saying "ten tens make one hundred" helps.
Add a zero
The 10s are the backbone of place value: 10 × 7 is 7 tens, which is 70. Knowing them well makes the 5s, 9s and 11s easy.
There are few mistakes here; the main one is reading 10 × 10 as 1,000. Saying "ten tens make one hundred" helps.
Count tens: 10 × 6 is six tens, 60. Then use it everywhere: 5 × 6 is half of 60, 9 × 6 is 60 − 6, 11 × 6 is 60 + 6.
3 × 10 = 30
Every multiplication fact has a division fact in its family: if 10 × 4 = 40, then 40 ÷ 10 = 4.
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