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125x 40+8 的简便计算

=125x8x40=1000x40=40000

乘法分配律:a*(b+c) =a*b+a*c (125-40)*8=125*8-40*8=1000-320=680

125x25x(40+8)=125x25x40+125x25x8=125x(25x4x10)+(125x8)x25=125x1000+25x1000=(125+25)x1000=150x1000=150000

125*(40-8) =125*32 =125*8*4 =1000*4 =4000 你好,本题已解答,如果满意 请点右上角“采纳答案”.

(40+125)x8=40X8+125X8=320+1000=1320 希望对你有帮助,满意请及时采纳,你的采纳是我回答的动力!

(125+40)*8=125*8+40*8=1000+320=1320

125x(35+8)=125x43=125x(40+3)=125x40+125x3=5000+375=5375

原式=125*8*40 =(125*8)*40 =1000*40 =40000望采纳.

125x(35+8)=125x(5x7+8)=125x(5x8-5+8)=125x(6x8-5)=125x8x6-125x5=1000x6-625=6000-625=5375

递等式计算125x(40+8)x25解:采用拆分法,原式=125x48x25=125x8x6X25=1000x150=150000

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