24/4+6*0.25=
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24/4+6*0.25=
24/4+6*0.25=
24/4+6*0.25=
24/4+6*0.25
=24×0.25+6×0.25
=(24+6)×0.25
=30×0.25
=7.5
24/4+6*0.25
=24/4+6*(1/4)
=(1/4)(24+6)
=(1/4)*30
=7.5
24/4+6*0.25=6+1.5=7.5
24/4+6*0.25= 24*(1/4)+6*(1/4)
=(24+6)*(1/4)
=30*(1/4)
=7.5
24/4+6*0.25
=6+1.5
=7.5
6+1.5=7.5
第一种算法:24/4+6*0.25
=6+6*0.25——————算出24/4,得到6
=6+3*0.5——————将6/2,0.25*2,乘积不变,变成3*0.5
=6+1.5———————将3*0.5算出来,得到1.5
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第一种算法:24/4+6*0.25
=6+6*0.25——————算出24/4,得到6
=6+3*0.5——————将6/2,0.25*2,乘积不变,变成3*0.5
=6+1.5———————将3*0.5算出来,得到1.5
=7.5————————将6+1.5算出来,得到7.5
第二种算法:24/4+6*0.25
=24*0.25+6*0.25——————24/4=24*1/4=24*0.25
=(24+6)*0.25——————提取公因数0.25,得到(24+6)*0.25
=30*0.25—————————将24+6,得到30
=7.5———————————将30*0.25,得到7.5
收起
24/4+6*0.25
=24/4+6/4
=(24+6)/4
=30/4
=7.5