来自拜朝峰的问题
怎样算简便就怎样算.6.71×0.52+4.8×0.6713.8+2.49+7.51+4.2102×4.531.7-0.5×0.7-1.65.
怎样算简便就怎样算.
6.71×0.52+4.8×0.6713.8+2.49+7.51+4.2102×4.531.7-0.5×0.7-1.65.
1回答
2020-04-09 18:53
怎样算简便就怎样算.6.71×0.52+4.8×0.6713.8+2.49+7.51+4.2102×4.531.7-0.5×0.7-1.65.
怎样算简便就怎样算.
6.71×0.52+4.8×0.6713.8+2.49+7.51+4.2102×4.531.7-0.5×0.7-1.65.
(1)6.71×0.52+4.8×0.671=0.671×5.2+4.8×0.671,=(5.2+4.8)×0.671,=10×0.671,=6.71;(2)3.8+2.49+7.51+4.2=(3.8+4.2)+(2.49+7.51),=8+10,=18;(3)102×4.5=(100+2)×4.5,=100×4.5+2×4.5,...