用递等式计算并用计算器验算.
(1)53-62+79.89-15.56
(2)78.37+(132.25-29.18)
(3)262.39-87.25-18.36
(4)198.2-(250.62-180.35)
用递等式计算并用计算器验算.(1)53-62+79.89-15.56(2)78.37+(132.25-29.18)(3)262.39-87.25-18.36(4)19
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解决时间 2021-02-16 10:20
- 提问者网友:wodetian
- 2021-02-16 02:30
最佳答案
- 五星知识达人网友:十年萤火照君眠
- 2020-04-23 01:59
解:(1)53-62+79.89-15.56,
=-9+79.89-15.56,
=70.89-15.56,
=55.33;
(2)78.37+(132.25-29.18),
=78.37+103.07,
=181.44;
(3)262.39-87.25-18.36,
=175.14-18.36,
=156.78;
(4)198.2-(250.62-180.35),
=198.2-70.27,
=127.93.解析分析:(1)(3)按照从左到右顺序计算即可解答,
(2)(4)按照先算括号里面的,再算括号外面的顺序计算即可解答.点评:解答本题要注意:(1)运算的顺序,(2)计算结果要准确.
=-9+79.89-15.56,
=70.89-15.56,
=55.33;
(2)78.37+(132.25-29.18),
=78.37+103.07,
=181.44;
(3)262.39-87.25-18.36,
=175.14-18.36,
=156.78;
(4)198.2-(250.62-180.35),
=198.2-70.27,
=127.93.解析分析:(1)(3)按照从左到右顺序计算即可解答,
(2)(4)按照先算括号里面的,再算括号外面的顺序计算即可解答.点评:解答本题要注意:(1)运算的顺序,(2)计算结果要准确.
全部回答
- 1楼网友:封刀令
- 2019-02-18 16:55
哦,回答的不错
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