9.9乘12.6怎么简算

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9.9乘12.6怎么简算9.9乘12.6怎么简算9.9乘12.6怎么简算9.9×12.6=(10-0.1)×12.6=10×12.6-0.1×12.6=126-1.26=126-(1+0.26)=12

9.9乘12.6怎么简算
9.9乘12.6怎么简算

9.9乘12.6怎么简算
9.9×12.6
=(10-0.1)×12.6
=10×12.6-0.1×12.6
=126-1.26
=126-(1+0.26)
=126-1-0.26
=125-0.26
=124.74