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0.25x3.2简算：0.25X3.2 =0.25X(4X0.8)=(0.25X4)X0.8 =1X0.8 =0.8
=0.25*4*0.8 =1*0.8 =0.8
=0.25X4X0.8 =1X0.8 =0.8
0.25x3.2 =0.25x4x0.8 =1x0.8 =0.8 望采纳，谢谢
用简便方法计算0.25X3.2 0.25X3.2 =0.25X(4X0.8)=(0.25X4)X0.8 =1X0.8 =0.8 (此题主要运用了乘法结合律进行简便计算。)
3.2乘0.25 =0.25x4x0.8 =1x0.8 =0.8
因为3.2=0.8×4，可以看出来4×0.25=1，所以整个式子可以变为0.8×4×0.25，先算4×0.25=1，再把1和0.8相乘就等于0.8。
利用乘法结合律就行 32可以看成4x8 25x32= 25x（4x8）= 25x4x8 = 100x8 = 800 3.2可以看成4x0.8 0.25x3.2= 0.25x4x0.8 = 1x0.8= 0.8
3.2×0.25 =(0.8×4)×0.25 =0.8×(4×0.25)=0.8×1 =0.8 愿对你有所帮助！
72×0.99 =72×(1-0.01)=72×1-72×0.01 =72-0.72 =71.29 0.25×3.2×12.5 =(0.25×4)×(0.8×12.5)=1×1 =1 48×1.25 =6×(8×1.25)=6×10 =60 2.5×1.2 =(2.5×0.4)×3 =1×3 =3
