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1.6乘7.5乘1.25和0.8乘0.25乘0.4乘12.5,这两个算...

采纳一下啦

0.8×12.5×0.25×0.4 =10×0.1 =1

1.6×7.5×1.25 =0.8×1.25×(2×7.5) =1×15 =15

1.6×7.5×1.25 =(2×7.5)×(0.8×1.25) =15×1 =15

1.6乘7.5乘1.25=0.2x7.5x8x1.25=1.5x10=15 日常运算中要懂得拆分,将较难的数字拆成简单的两个数的乘积形式,题目就会简单很多。

问题 “1.6*7.5*1.25”用简便方法怎样计算? 主回答 1.6×7.5×1.25 =4×7.5×0.4×1.25 =3×0.5 =1.5

(0.2*8)*7.5*1.25 =(0.2*7.5)*(8*1.25) =1.5*10 =15 乘法交换律:a×b=b×a 两个数相乘,交换加数的位置,积不变,这叫做乘法的交换律。 乘法结合律:a×b×c=(a×b)×c=a×(b×c) 三个数相乘,先把前两个数相乘,在和第三个数相乘,或者先把后两...

1.6×7.5×1.25 =(2×7.5)×(0.8×1.25) =15×1 =15 56×1125 =7×(8×1.25) =7×10 =70 3.4×7×1.5 =(1.7×7)×(2×1.5) =11.9×3 =35.7 0.8×0.25×0.4×12.5 =(0.8×12.5)×(0.25×0.4) =10×0.1 =1

1.6×7.5×1.5 =(0.2×7.5)×(1.5×8) =1.5×12 =18 你好,本题已解答,如果满意 请点右下角“采纳答案”。

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