(+3又1/7)×(3又1/7-7又1/3)×(-7/22)×(-21/22)怎么简便运算
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![(+3又1/7)×(3又1/7-7又1/3)×(-7/22)×(-21/22)怎么简便运算](/uploads/image/z/189567-63-7.jpg?t=%28%2B3%E5%8F%881%2F7%29%C3%97%283%E5%8F%881%2F7-7%E5%8F%881%2F3%29%C3%97%28-7%2F22%29%C3%97%28-21%2F22%29%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
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(+3又1/7)×(3又1/7-7又1/3)×(-7/22)×(-21/22)怎么简便运算
(+3又1/7)×(3又1/7-7又1/3)×(-7/22)×(-21/22)怎么简便运算
(+3又1/7)×(3又1/7-7又1/3)×(-7/22)×(-21/22)怎么简便运算
(+3又1/7)×(3又1/7-7又1/3)×(-7/22)×(-21/22)
=(22/7)×(22/7-22/3)×(-7/22)×(-21/22)
=(22/7)×(-21/22)×(-1+7/3)
=(-3)×(-4/3)
=4