简便 1/3÷(3/8+3/4×1/2) (2/3+2/9)÷10/11
1个回答
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1/3÷(3/8+3/4×1/2)
=1/3÷(3/8+3/8)
=1/3÷3/4
=4/9
(2/3+2/9)÷10/11
=(1/3+1/9)×11/5
=4/9×11/5
=44/45
=1/3÷(3/8+3/8)
=1/3÷3/4
=4/9
(2/3+2/9)÷10/11
=(1/3+1/9)×11/5
=4/9×11/5
=44/45
追问
要简便算法
追答
1/3÷(3/8+3/4×1/2)
=1/3÷(3/8+3/8)
=1/3÷(3/8×2)
=1/3÷3/4
=4/9
这些题简算不明显,与普通计算几乎没有区别
(2/3+2/9)÷10/11
=(1/3÷2+2/9÷2)÷(10/10÷2)
=(1/3+1/9)×11/5 这里用了简算,但是效果不明显
=4/9×11/5
=44/45
来自:求助得到的回答
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