那(-217又7/9)-(-7)和-22/7x(7/22-4/3)x7/22÷(-22/21)呢?
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那(-217又7/9)-(-7)和-22/7x(7/22-4/3)x7/22÷(-22/21)呢?
(-217又7/9)-(-7)
= (-217又7/9)+7
= -210又7/9
-22/7x(7/22-4/3)x7/22÷(-22/21)
=-22/7 x 7/22 x(7/22-4/3)×(-21/22)
=-1x(7/22-4/3)×(-21/22)
=(7/22-4/3)× 21/22
=(21/66- 88/66) ×21/22
= - 67/22 ×21/22
= - 1407/484
= - 2又484分之439
= (-217又7/9)+7
= -210又7/9
-22/7x(7/22-4/3)x7/22÷(-22/21)
=-22/7 x 7/22 x(7/22-4/3)×(-21/22)
=-1x(7/22-4/3)×(-21/22)
=(7/22-4/3)× 21/22
=(21/66- 88/66) ×21/22
= - 67/22 ×21/22
= - 1407/484
= - 2又484分之439
(-217又7/9)-(-7)和-22/7x(7/22-4/3)x7/22÷(-22/21)
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