2.25-( -1又3/4+3又1/4)-(1.75-8.73+5又3/4)
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2.25-(-1又3/4+3又1/4)-(1.75-8.73+5又3/4)2.25-(-1又3/4+3又1/4)-(1.75-8.73+5又3/4)2.25-(-1又3/4+3又1/4)-(1.75-
2.25-( -1又3/4+3又1/4)-(1.75-8.73+5又3/4)
2.25-( -1又3/4+3又1/4)-(1.75-8.73+5又3/4)
2.25-( -1又3/4+3又1/4)-(1.75-8.73+5又3/4)
＝2.25-1.5+1.23
＝1.98