能简便的用简便方法计算.(递等式哦)额,上课没听,非常急~(悬赏可以在加)题目:(1)5/24(二十四分之五)÷7/8(2)17/121÷51/88(3)49/91÷13/14(4)5/7×2/3÷1/3(5)1/8×9/25+16/25÷8(6)7/72÷1
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![能简便的用简便方法计算.(递等式哦)额,上课没听,非常急~(悬赏可以在加)题目:(1)5/24(二十四分之五)÷7/8(2)17/121÷51/88(3)49/91÷13/14(4)5/7×2/3÷1/3(5)1/8×9/25+16/25÷8(6)7/72÷1](/uploads/image/z/1680924-12-4.jpg?t=%E8%83%BD%E7%AE%80%E4%BE%BF%E7%9A%84%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97.%EF%BC%88%E9%80%92%E7%AD%89%E5%BC%8F%E5%93%A6%EF%BC%89%E9%A2%9D%2C%E4%B8%8A%E8%AF%BE%E6%B2%A1%E5%90%AC%2C%E9%9D%9E%E5%B8%B8%E6%80%A5%7E%EF%BC%88%E6%82%AC%E8%B5%8F%E5%8F%AF%E4%BB%A5%E5%9C%A8%E5%8A%A0%EF%BC%89%E9%A2%98%E7%9B%AE%EF%BC%9A%EF%BC%881%EF%BC%895%2F24%EF%BC%88%E4%BA%8C%E5%8D%81%E5%9B%9B%E5%88%86%E4%B9%8B%E4%BA%94%EF%BC%89%C3%B77%2F8%EF%BC%882%EF%BC%8917%2F121%C3%B751%2F88%EF%BC%883%EF%BC%8949%2F91%C3%B713%2F14%EF%BC%884%EF%BC%895%2F7%C3%972%2F3%C3%B71%2F3%EF%BC%885%EF%BC%891%2F8%C3%979%2F25%2B16%2F25%C3%B78%EF%BC%886%EF%BC%897%2F72%C3%B71)
能简便的用简便方法计算.(递等式哦)额,上课没听,非常急~(悬赏可以在加)题目:(1)5/24(二十四分之五)÷7/8(2)17/121÷51/88(3)49/91÷13/14(4)5/7×2/3÷1/3(5)1/8×9/25+16/25÷8(6)7/72÷1
能简便的用简便方法计算.(递等式哦)
额,上课没听,非常急~(悬赏可以在加)题目:
(1)5/24(二十四分之五)÷7/8(2)17/121÷51/88(3)49/91÷13/14(4)5/7×2/3÷1/3(5)1/8×9/25+16/25÷8(6)7/72÷14/39×24/91(7)5/6÷(1/2+5/6)
能简便的用简便方法计算.(递等式哦)额,上课没听,非常急~(悬赏可以在加)题目:(1)5/24(二十四分之五)÷7/8(2)17/121÷51/88(3)49/91÷13/14(4)5/7×2/3÷1/3(5)1/8×9/25+16/25÷8(6)7/72÷1
5/24÷7/8
=5/24*8/7
=5/3*1/7
=5/21
17/121÷51/88
=17/121*88/51
=17/11*8/51
=1/11*8/3
=8/33
49/91÷13/14
=49/91*14/13
=686/1183
5/7×2/3÷1/3
=5/7*2/3*3
=5/7*2
=10/7
1/8×9/25+16/25÷8
=1/8*9/25+16/25*1/8
=1/8(9/25+16/25)
=1/8*25/25
=1/8
7/72÷14/39×24/91
7/72*39/14*24/91
=1/72*39/2*24/91
=1/72*39*12/91
=1/6*39*1/91
=1/2*13*1/91
=13/182
5/6÷(1/2+5/6)
=5/6÷(3/6+5/6)
=5/6÷8/6
=5/6*6/8
=5/8