1.23+0.9*12.3简便计算
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![1.23+0.9*12.3简便计算](/uploads/image/z/169553-65-3.jpg?t=1.23%2B0.9%2A12.3%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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1.23+0.9*12.3简便计算
1.23+0.9*12.3简便计算
1.23+0.9*12.3简便计算
1.23+0.9*12.3
=1.23+9*1.23
=1.23*(1+9)
=1.23*10
=12.3
解
1.23+0.9*12.3
=1.23+9×1.23
=1.23×(9+1)
=1.23×10
=12.3
0.1*12.3+0.9*12.3=1*12.3