4.9+3.27+0.82-1.05简便方法
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4.9+3.27+0.82-1.05 =4.9+3.27+(0.1+0.72)-(1.06-0.01) =(4.9+0.1)+(3.27+0.73)-1.06 =5+4-1.06 =7.94
咨询记录 · 回答于2022-06-23
4.9+3.27+0.82-1.05简便方法
4.9+3.27+0.82-1.05 =4.9+3.27+(0.1+0.72)-(1.06-0.01) =(4.9+0.1)+(3.27+0.73)-1.06 =5+4-1.06 =7.94
主要是运用交换律