来自董国强的问题
脱式计算,能简算的简算.4.2-1.38+5.8-3.620.125×0.25×322÷23-23÷290.5×99+90.5.
脱式计算,能简算的简算.
4.2-1.38+5.8-3.62
0.125×0.25×32
2÷23-23÷2
90.5×99+90.5.
1回答
2020-04-09 12:32
脱式计算,能简算的简算.4.2-1.38+5.8-3.620.125×0.25×322÷23-23÷290.5×99+90.5.
脱式计算,能简算的简算.
4.2-1.38+5.8-3.62
0.125×0.25×32
2÷23-23÷2
90.5×99+90.5.
(1)4.2-1.38+5.8-3.62
=4.2+5.8-(1.38+3.62)
=10-5
=5;
(2)0.125×0.25×32
=0.125×0.25×8×4
=(0.125×8)×(0.25×4)
=1;
(3)2÷23