7又1/3÷[1又1/4÷(4又2/3-1/2)]怎么算?
1个回答
原式
= 22/3÷[5/4÷(14/3-1/2)]
= 22/3÷[5/4÷25/6]
= 22/3÷3/50
= 1100/9
= 122又2/9
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