脱式计算70.8-1.25-1.75 5.81+8.3+4.19+11.7  ...
答案:1 悬赏:40 手机版
解决时间 2021-02-23 22:11
- 提问者网友:做自己de王妃
- 2021-02-23 02:08
脱式计算70.8-1.25-1.75 5.81+8.3+4.19+11.7  ...
最佳答案
- 五星知识达人网友:不想翻身的咸鱼
- 2021-02-23 03:34
(1)70.8-1.25-1.75
=70.8-(1.25+1.75)
=70.8-3
=67.8;
(2)5.81+8.3+4.19+11.7
=(5.81+4.19)+(8.3+11.7)
=10+20
=30;
(3)51.8-4.8×(2.03-0.18)
=51.8-4.8×1.85
=51.8-8.88
=42.92;
(4)0.25×17.3×0.4
=0.25×0.4×17.3
=0.1×17.3
=1.73;
(5)7.2×10.1
=7.2×(10+0.1)
=7.2×10+7.2×0.1
=72+0.72
=72.72;
(6)3.54×0.29-0.29×2.54
=0.29×(3.54-2.54)
=0.29×1
=0.29.
=70.8-(1.25+1.75)
=70.8-3
=67.8;
(2)5.81+8.3+4.19+11.7
=(5.81+4.19)+(8.3+11.7)
=10+20
=30;
(3)51.8-4.8×(2.03-0.18)
=51.8-4.8×1.85
=51.8-8.88
=42.92;
(4)0.25×17.3×0.4
=0.25×0.4×17.3
=0.1×17.3
=1.73;
(5)7.2×10.1
=7.2×(10+0.1)
=7.2×10+7.2×0.1
=72+0.72
=72.72;
(6)3.54×0.29-0.29×2.54
=0.29×(3.54-2.54)
=0.29×1
=0.29.
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