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125x(8+4)x25如何巧算?谢谢!

(125x8)x25+125×(4x25) =1000x25+125x100 =25000+12500 =37500

(8+4)x25 =3×4×25 =3×100 =300

(8+4)x25 =12x25 =3x4x25 =3x100 =300 、, 你好,本题已解答,如果满意 请点右上角“采纳答案

括号内先算,4-8为-4,4和25相乘为100,100乘125,为12500,加个负号,就是-12500

125x(4+8)x25 =125x12x25 =(125×3)x(4x25) =375×100 =37500

0.4x125x25x0.8简便计算 0.4x125x25x0.8 =(0.4*25)*(125*0.8) =10*100 =1000

1.25x(8+0.4)x25 = 1.25x8x25+1.25x0.4x25 =10x25+1.25x0.4x25 =250+1.25x10 =250+12.5 =262.5

125*25*(4+8)=125*25*12=125*12+25*12不等于125*8+25*4

9000000 解析: 24×25×120×125 =(6×4)×25×(15×8)×125 =(6×15)×(4×25)×(8×125) =90×100×1000 =9000000

[(4x8)x25-8]x125 =4×8×25×125-8×125 =4×25×8×125-8×125 =100×1000-1000 =100000-1000 =99000

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