用简便方法计算下面各题2.2×2.5 1.8×2.5
答案:4 悬赏:0 手机版
解决时间 2021-04-05 08:54
- 提问者网友:几叶到寒
- 2021-04-05 02:01
用简便方法计算下面各题2.2×2.5 1.8×2.5
最佳答案
- 五星知识达人网友:掌灯师
- 2021-04-05 03:07
2.2×2.5+1.8×2.5
=2.5×(2.2+1.8)
=2.5×4
=10
=2.5×(2.2+1.8)
=2.5×4
=10
全部回答
- 1楼网友:轻雾山林
- 2021-04-05 05:40
用简便方法计算下面各题2.2×2.5 1.8×2.5
解:
2.2×2.5
=(2+0.2)x2.5
=2x2.5+0.2x2.5
=5+0.5
=5.5
1.8×2.5
=(2-0.2)x2.5
=5-0.5
=4.5
- 2楼网友:傲气稳了全场
- 2021-04-05 05:01
2.2×2.5-1.8×2.5
=(2.2-1.8)x2.5
=0.4x2.5
=1
=(2.2-1.8)x2.5
=0.4x2.5
=1
- 3楼网友:孤老序
- 2021-04-05 04:34
2.2×2.5+1.8×2.5
=(2.2+1.8)×2.5
=4×2.5
=10
=(2.2+1.8)×2.5
=4×2.5
=10
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