Find using identities 10.1 ×9.9
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18
Answer:
Hi!
=> 10.1 * 9.9
=> (10+0.1) * (10-0.1)
We know that (a+b)(a-b) = a^2-b^2
So,
=> (10+0.1) * (10-0.1)
=> (10^2)-(0.1)^2
=> 100 - 0.01
=> 99.99
HOPE IT HELPS!!!!
Answered by
6
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Sorry for bad handwriting
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