简便算160x0·25x12·5怎么算
简便算160x0·25x12·5怎么算
160x0·25x12·5
=20x8x0·25x12·5
=20x0.25x(8x12.5)
=5x100
=500
160x0·25x12·5
=20x8x0·25x12·5
=20x0.25x(8x12.5)
=5x100
=500
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第1个回答 2016-09-22
看到25就找4(25*4=100),看到125找8(125*8=1000),将原式1600分解
=(4*8*5)*0.25*12.5
=(4*0.25)*(8*12.5)*5
=(1)*(100)*5
=500
=(4*8*5)*0.25*12.5
=(4*0.25)*(8*12.5)*5
=(1)*(100)*5
=500