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(-217又7/9)-(-7)和-22/7x(7/22-4/3)x7/22÷(-22/21)

题目详情
(-217又7/9)-(-7)和-22/7x(7/22-4/3)x7/22÷(-22/21)
▼优质解答
答案和解析
(-217又7/9)-(-7)
=-217-7/9+7
=-217+7-7/9
=-210-7/9
=-210又9分之7
-22/7x(7/22-4/3)x7/22÷(-22/21)
=-22/7*7/22*(7/22-4/3)*(-21/22)
=7/22*21/22-4/3*21/22
=7/22(21/22-4)
=-7/22*67/22
=-469/484
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