【简算】 (111+1/9)×9 1/3×4/9+5/9÷3 (7/5-1/3)÷(1/3+1/5) (9/16÷9+9/16×1/9)÷5/8 5
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(111+1/9)×9
=111×9+1/9×9
=999+1
=1000
1/3×4/9+5/9÷3
=1/3×4/9+5/9×1/3
=1/3×(4/9+5/9)
=1/3×1
=1/3
(7/5-1/3)÷(1/3+1/5)
=(7/5-1/3)×15/8
=7/5×15/8-1/3×15/8
=21/8-5/8
=2
(9/16÷9+9/16×1/9)÷5/8
=(9/16×1/9+9/16×1/9)÷5/8
=9/16×1/9×2×8/5
=1/5
=111×9+1/9×9
=999+1
=1000
1/3×4/9+5/9÷3
=1/3×4/9+5/9×1/3
=1/3×(4/9+5/9)
=1/3×1
=1/3
(7/5-1/3)÷(1/3+1/5)
=(7/5-1/3)×15/8
=7/5×15/8-1/3×15/8
=21/8-5/8
=2
(9/16÷9+9/16×1/9)÷5/8
=(9/16×1/9+9/16×1/9)÷5/8
=9/16×1/9×2×8/5
=1/5
追问
内个。。第3个答案是1/4。可以改改过程么,而且有些不太简便啊
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