6.3×10.3简算.0.98×3.2简算,2.5×4.4×0.7简算,5.8×8.5+5.8×0.5+5.8的简算.
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 09:57:26
![6.3×10.3简算.0.98×3.2简算,2.5×4.4×0.7简算,5.8×8.5+5.8×0.5+5.8的简算.](/uploads/image/z/465519-39-9.jpg?t=6.3%C3%9710.3%E7%AE%80%E7%AE%97.0.98%C3%973.2%E7%AE%80%E7%AE%97%2C2.5%C3%974.4%C3%970.7%E7%AE%80%E7%AE%97%2C5.8%C3%978.5%EF%BC%8B5.8%C3%970.5%EF%BC%8B5.8%E7%9A%84%E7%AE%80%E7%AE%97.)
6.3×10.3简算.0.98×3.2简算,2.5×4.4×0.7简算,5.8×8.5+5.8×0.5+5.8的简算.
6.3×10.3简算.0.98×3.2简算,2.5×4.4×0.7简算,5.8×8.5+5.8×0.5+5.8的简算.
6.3×10.3简算.0.98×3.2简算,2.5×4.4×0.7简算,5.8×8.5+5.8×0.5+5.8的简算.
(1).6.3×10.3=6.3×(10+0.3)=6.3×10+6.3×0.3=63+1.89=64.89
(2).0.98×3.2=3.2×(1-0.02)=3.2×1-3.2×0.02=3.2-0.064=3.136
(3).2.5×4.4×0.7=2.5×0.4×11×0.7=(2.5×0.4)×11×0.7=1×11×0.7=7.7
(4).5.8×8.5+5.8×0.5+5.8=5.8.×(8.5+0.5+1)=5.8×10=58
打得辛苦啊,
(1).6.3×10.3=6.3×(10+0.3)=6.3×10+6.3×0.3=63+1.89=64.89
(2).0.98×3.2=3.2×(1-0.02)=3.2×1-3.2×0.02=3.2-0.064=3.136
(3).2.5×4.4×0.7=2.5×0.4×11×0.7=(2.5×0.4)×11×0.7=1×11×0.7=7.7
(4).5.8×8.5+5.8×0.5+5.8=5.8.×(8.5+0.5+1)=5.8×10=58