56 56X99怎么用简便计算

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56 56X99怎么用简便计算

56 56X99怎么用简便计算
56 56X99怎么用简便计算

56 56X99怎么用简便计算
56X99=56X(100-1)=56X100-56=5600-56=5544

5656x100-5656

5656×99
=56×101×99
=56×9999
=56×(10000-1)
=56×10000-56×1
=560000-56
=559944

5656X99
=56 56X(100-1)
=5656X100-5656
=565600-5656
=559944

5656×99=5656×(100-1)=5656×100-(5600+56)=565600-5600-56=560000-56=559944