数学题目 简便计算 追加分

我想楼主要的不是最后答案 而且是过程吧

0.25*(39+1)

0.125*(80-8)
4.65*32+4.65*10*2.5+4.65*43=4.65*（32+25+43）

第四题原理和第三题一样
7.25*67.875+7.25*78.875+7.25*53.375=7.25*（67.875+78.875+53.375）

0.25×39+0.25 =0.25*(39+1)=0.25*40=10
0.125×72=0.125*8*9=1*9=9

4.65×32+2.5×46.5+0.465×430
=4.65(32+25+43)=4.65*100=465

7.25×67.875+725×0.7875+7250×0.053375 =7.25*(67.875+78.75+53.375)
=7.25*200=1450

*为乘号

1. 0.25×39+0.25=0.25（1+39）=10
2. 0.125×72=1/8×72=9
3. 4.65×32+2.5×46.5+0.465×430=4.65×32+25×4.65+4.65×43=4.65×(32+25+43)=465
4. 7.25×67.875+725×0.7875+7250×0.053375
=7.25×67.875+7.25×78.75+7.25×53.375
=7.25×(67.875+78.75+53.375)=7.25×200=1450

您好！

0.25×39+0.25
=0.25*(39+1)
=0.25*40
=10

4.65×32+2.5×46.5+0.465×430
=4。65*32+4。65*25+4。65*43
=4.65*(25+32+43)
=465

7.25×67.875+725×0.7875+7250×0.053375
=