12又3/4÷1又1/5+5.25*1/6
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![12又3/4÷1又1/5+5.25*1/6](/uploads/image/z/1756845-45-5.jpg?t=12%E5%8F%883%2F4%C3%B71%E5%8F%881%2F5%2B5.25%2A1%2F6)
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12又3/4÷1又1/5+5.25*1/6
12又3/4÷1又1/5+5.25*1/6
12又3/4÷1又1/5+5.25*1/6
5.4/12 =5.4/6/2 =0.9/2 =0.45