递等式算式!2.75X0.19+0.125X1.9 六年级的,简便!过程!一小时内!

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/06 05:43:41
递等式算式!2.75X0.19+0.125X1.9 六年级的,简便!过程!一小时内!
x){0Χ{$M# -iֵOwnykY-:5<ٷ_+hxmOZmk~ ܈-Ht Os&H XNd)F 1|0Р"Z^S V,vC `1)P #jm*0I _Q IQ{

递等式算式!2.75X0.19+0.125X1.9 六年级的,简便!过程!一小时内!
递等式算式!2.75X0.19+0.125X1.9 六年级的,简便!过程!一小时内!

递等式算式!2.75X0.19+0.125X1.9 六年级的,简便!过程!一小时内!
2.75X0.19+0.125X1.9
=2.75×0.19+1.25×0.19
=0.19×﹙2.75+1.25)
=0.19×4
=0.76

=10x[(2.75x0.19)/10]+10x[(0.125x1.9)/10]
=10x[(0.275x0.19)+(0.125x0.19)]
=10x[0.19x(0.275+0.125)]
=10x0.4x0.19
=0.76