1.23+0.9*12.3简便计算
问题描述:
1.23+0.9*12.3简便计算
答
0.1*12.3+0.9*12.3=1*12.3
答
解
1.23+0.9*12.3
=1.23+9×1.23
=1.23×(9+1)
=1.23×10
=12.3
答
1.23+0.9*12.3
=1.23+9*1.23
=1.23*(1+9)
=1.23*10
=12.3