2.5×1.7×( )×3.6+6.4×( )×0.75×( )-0.75×( )99×0.43+( )
问题描述:
2.5×1.7×( )×3.6+6.4×( )×0.75×( )-0.75×( )99×0.43+( )
五(1)班开展互帮互助活动,学习了《整数乘法运算定律推广到小数》后,小明想编一些题目让小海练练.你能帮小明把题目编完吗?
题:2.5×1.7×( )×3.6+6.4×( )×0.75×( )-0.75×( )99×0.43+( )
答
2.5×1.7×( 0.75 )×3.6+6.4×(2.5)×0.75×(1.7)-0.75×( 25×1.7 )
99×0.43+(1×0.43)是2.5×1.7×()()×3.6..........你敢确定百分之百对吗?2.5×1.7×(0.3 )×(1)×3.6+6.4×( 1.7)×0.75×(1 )-0.75×( 1)46.3×03.56+5.38×5.6-0.056这道题怎么做?请5分钟内告诉我答案!要不就不给你选为满意答案!46.3×03.56+5.38×5.6-0.056=(46.3+53.8-0.1)×0.56=(100.1-0.1)×0.56=100×0.56=56题打错了,应该是46.3×0.56+5.38×5.6-0.056!结果对了,可是过程有点晕,你能给我讲一下吗?求你了!!!!!!!!~46.3×0.56+5.38×5.6-0.056对每个乘积项取公因数0.56,5.6=0.56*10;0.056=0.56*0.1;合并同类项=(46.3+53.8-0.1)×0.56=(100.1-0.1)×0.56=100×0.56=56