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25*41简便计算

25×41= 25×(40+1)= 25×40+25= 1000+25= 1025

=25×4+25分之1×4 =100+25分之4 =100又25分之4

4/3 2/1 4/1 是不是 4分之3 2分之1 4分之1? 应该写作 3/4 1/2 1/4 25x3/4-(-25)x1/2+25x1/4 =75/4+25/2+25/4 =75/4+25/4+25/2 =100/4+25/2 =25+25/2 =75/2 =37又2分之1 =37.5

1/2-4/25+4/5 =16/25-4/25+1/2 =12/25+1/2 =24/50+25/50 =49/50

2/5×25%+1/4×4/5 =2/5×1/4+1/4×4/5 =(2/5+4/5)×1/4 =6/5×1/4 =3/10

2.5×1.25×4×8 =(2.5×4)×(1.25×8) =10×10 =100 你好,本题已解答,如果满意 请点右上角“采纳答案”。

4.25*(7.1+51)

0.25×42+25%乘55+3×(1/4)——简便计算 0.25×42+25%乘55+3×(1/4) =0.25*(42+55+3) =0.25*100 =25 乘法分配律

4.25x71-42.5x5.1 =4.25*71-4.25*51 =4.25*(71-51) =4.25*20 =85

你题目错了吧

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