0.4*99*0.4的简便运算

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0.4*99*0.4的简便运算
0.4*99*0.4的简便运算

0.4*99*0.4的简便运算
0.4*99*0.4
=0.4*0.4*(100-1)
=0.16*100-0.16
=16-0.16
=15.84

0.0.4*100*0.4-0.016

0.4×99×0.4
=0.4×0.4×(100-1)
=0.16×100-0.16
=16-0.16
=15.84

0.4×99×0.4
=0.4×0.4×(100-1)
=0.16×100-0.16
=16-0.16
=15.84