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1点87乘9点9加0点187怎样简便计算

1.87×9.9+1.87×0.1

87×99+87 =87×(99+1) =87×100 =8700

187乘21减87乘21简便计算怎么做 187x21-87x21 =21x(187-87) =21x100 =2100

21×39+87×39-39×9 =(21+87-9)×39 =99×39 =(100-1)×39 =3900-39 =3861

99乘以87加77乘以9加33乘以18 =99×87+7×99+99×6 =99×(87+7+6) =99×100 =9900

=0.25x4x9.87 =1x9.87 =9.87

101x0.87-0.99x87 =0.87x(101-99) =0.87x2 =1.74 3.9x1.7+3.9x7.3+3.9 =3.9x(1.7+7.3+1) =3.9x10 =39 1.87x9.9+0.187 =1.87x(9.9+0.1) =1.87x10 =18.7

9.87-(7.98+0.87) =9.87-7.98-0.87 =9-7.98 =1.02

87×9+87×2 =87×(9+2) =87×11 =957 你好,本题已解答,如果满意,请点右上角“采纳答案”,支持一下。

3.56+4.54+6.44+5.46 5.03-0.25-1.75 4.86+5.24-1.86 8.13+(1.87-0.5) 23.7-1.6-3.7-8.4 87.4-(21.25+17.4) -8.75 14.6-9.9 1.9+1.99+1.999 19.43-(6.72+1.43) 2.69-1.35+3.31-2.65 17.28-3.86-6.14+2.72 5.25+3.76...

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