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数学
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72.19+6.48+27.81-1.38-5.48-0.62=?(简便运算)
人气:250 ℃ 时间:2019-10-10 06:39:55
解答
72.19+6.48+27.81-1.38-5.48-0.62
=72.19+27.81+6.48-1.38-5.48-0.62
=100+5.1-(5.48+0.62)
=105.1-6.1
=99
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