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2.24-0.54 0.76-1.46用简便方法计算解答:2.24-0.54 +0.76-1.46=2.24+0.76-(0.54+1.46)=3-2=1
2.24-0.54 =2.24-0.3-0.24=2-0.3=1.70.76-1.46=0.76-0.7-0.76=-0.7