Multiplying by 19 or 21 mentally Let’s Recap
We learnt about how to use factors to help us multiply.
Now try these. Work them out in your head. 7 × 20 = 13 × 20 = 8 × 20 =
12 × 20 = 12 × 2 × 10 = 24 × 10 = 240
Start Thinking
Riana has been writing out the 8 times table. Here is some of her work.
9 × 8 = 72 10 × 8 = 80 11 × 8 = 88 12 × 8 = 96 13 × 8 = 104
Write the next three lines of the times table. Talk to a partner about how you worked it out.
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01/12/2021 14:51
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