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89x24十89x76怎么简算

解:原式= 89×(24+76) =89×100 =8900

76×(201–1)( 71–71)×189 139×(24+75)

89x24估算是90x24

89x124-89x24 =89x(124-24) =89x100 =8900 希望帮到你 望采纳 谢谢 加油

其实就是89×100=8900

540-(103+197)=540-300=240 412*(100+1)=412*100+412*1=41200+412=41612 125*24*25=125*(6*4)*25=(125*6)*(4*25)=750*100=75000 752-(52+89)=(752-52)-89=700-89=611 其实简便计算真的很好用呢~学会了口算速度大大加快~

89X124-89X24 =89×(124-24) =89×100 =8900

89x5十11x5 =(89+11)x5 =100x5 =500 25x24 =25x(4x6) =(25x4)x6 =100x6 =600 44x25 =(11x4)x25 =11x(4x25) =11x100 =1100 125x16x2222 =125x(8x2)x2222 =(125x8)x(2x2222) =1000x4444 =4444000 25x32x125x17 =25x(4x8)x125x17 =(25x4)x(8x125)...

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