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Friday, 15 April 2016

WALT Use place value to show your workings out of this problem


84 x 16 = 1344


Use place value to show your workings out of this problem





8 x 16 = 128 = (80 x 16 = 1280)
4 x 16 = 64
∴84 x 16 = 1344


Use doubling and halving to show how repeated addition works.

84 x 16 =
÷4    x4
21 x 64 =
20 x 60 = 2400
21 x 64= 1344
∴84 x 16 = 1344    

Use rounding and compensating  to show how skip counting works.

168X8=800+480+64=1344
∴84X16=1344



Use words to explain your problem solving thinking.


eight times sixteen equals one hundred and twenty eight so eight times sixteen equals one thousand two hundred and eighty. four times sixteen equals sixty four. So eighty four times sixteen equals one thousand three hundred and fourty four.





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