脱式计算.2.5+(6.2-2.6)+1.8119-(42.5+1.6+3.6)7.24+(3.1-3.09)[0.15+(2.4-1.8)]×200.78×[12-
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解决时间 2021-11-25 14:38
- 提问者网友:做自己de王妃
- 2021-11-24 21:52
脱式计算.2.5+(6.2-2.6)+1.8119-(42.5+1.6+3.6)7.24+(3.1-3.09)[0.15+(2.4-1.8)]×200.78×[12-
最佳答案
- 五星知识达人网友:洒脱疯子
- 2021-11-24 22:37
①2.5+(6.2-2.6)+1.8
=2.5+3.6+1.8
7.9;
②119-(42.5+1.6+3.6)
119-47.7
=71.3;
③7.24+(3.1-3.09)
=7.24+0.01
=7.25;
④[0.15+(2.4-1.8)]×20
=[0.15+0.6]×20
=0.75×20
=15;
⑤0.78×[12-(1.45+3.8)]
=0.78×[12-5.25]
=0.78×6.75
=5.265;
⑥9.07-22.78÷3.4
=9.07-6.7
=2.37.
=2.5+3.6+1.8
7.9;
②119-(42.5+1.6+3.6)
119-47.7
=71.3;
③7.24+(3.1-3.09)
=7.24+0.01
=7.25;
④[0.15+(2.4-1.8)]×20
=[0.15+0.6]×20
=0.75×20
=15;
⑤0.78×[12-(1.45+3.8)]
=0.78×[12-5.25]
=0.78×6.75
=5.265;
⑥9.07-22.78÷3.4
=9.07-6.7
=2.37.
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