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0.8×4×12.5×2.5

0.8×4×12.5×2.5 =(0 .8*12.5)*(4*2.5) =10*10 =100 使用乘法交换律 谢谢采纳

解:原式=(2.5×4)×(12.5×0.8) =10×10 =100

12.5×(0.4+0.8)×2.5 =12.5×(0.4×2.5+0.8×2.5) =12.5×(1+2) =12.5×3 =37.5 望采纳 谢谢

12.5×0.4×2.5×8 12.5×0.4×2.5×8 = (12.5×8)×(0.4×2.5) =100×1 =100

(1)0.8×4×2.5×12.5 =(0.8×12.5)×(4×2.5)=10×10=100; (2)4.3×7+4.3×2+4.3=4.3×(7+2+1)=4.3×10=43.

12.5×(0.8+4)×2.5 =12.5×0.8×2.5+12.5×4×2.5 =10x2.5+12.5x10 =25+125 =150

2.5+0.8×12.5 =2.5+10 =12.5 直接计算简便 祝天天向上。

12.5x2.5x0.8x4 =(12.5x0.8)x(2.5x4) =10x10 =100

. 4×0.8×2.5×12.5 =(4×2.5)×(0.8×12.5) =10×10 =100

(1)12.5×0.4×2.5×8=12.5×8×0.4×2.5=(12.5×8)×(0.4×2.5)=100×1=100(2)9.5×101=9.5×(100+1)=9.5×100+9.5×1=950+9.5=959.5(3)4.2×7.8+2.2×4.2=4.2×(7.8+2.2)=4.2×10=42 (4)0.8×72.4×12.5=0.8×12.5×72.4=10×72.4=724

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