递等式,写过程,一步一步来,不用简便运算
(1)5/6÷5×1/5+7/9×9/4(2)4/5÷7/9×9/8+1/5(3)2/9-7/16×2/9(4)24÷7/6+3/5...
(1)5/6÷5×1/5+7/9×9/4 (2)4/5÷7/9×9/8+1/5 (3)2/9-7/16×2/9 (4)24÷7/6+3/5
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(1)5/6÷5×1/5+7/9×9/4 (2)4/5÷7/9×9/8+1/5
=5/6*1/5*1/5+7/9*9*4 =4/5*9/7*9/8+1/5
=1/30+7/4 =81/70+1/5
=2/60+105/60 =81/70+14/70
=107/60 =95/70=19/14
3)2/9-7/16×2/9 (4)24÷7/6+3/5
=2/9-7/72 =24*6/7+3/5
=16/72-7/72 =144/7+3/5
=9/72=1/8 =720/35+21*35
=741/35
=5/6*1/5*1/5+7/9*9*4 =4/5*9/7*9/8+1/5
=1/30+7/4 =81/70+1/5
=2/60+105/60 =81/70+14/70
=107/60 =95/70=19/14
3)2/9-7/16×2/9 (4)24÷7/6+3/5
=2/9-7/72 =24*6/7+3/5
=16/72-7/72 =144/7+3/5
=9/72=1/8 =720/35+21*35
=741/35
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