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February 4, 2021 at 5:57 pm
#30264
Participant
Hi Ken
I have a doubt in question 6 (practice 4) lesson 15.
17 x 16 My answer is 282 but the answer in the course book is 272. pls clarify
17 -3
16 -4
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13/12 1 at tens place will be added to 3 therefore 142
as base is 20 we multiply by 14 by 2 therefore 282
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