1.(九分之四+七分之六）*四十一分之一+三分之一
题目
1.(九分之四+七分之六）*四十一分之一+三分之一
2.四分之一÷[八分之七-（八分之三+四分之一）]
中括号：[ ]
答案
(4/9+6/7)*1/41+1/3
=82/63*1/41+1/3
=2/63+1/3
=23/63
1/4/[7/8-(3/8+1/4)]
=1/4/[7/8-5/8]
=(1/4)/(1/4)
=1
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