2（18.5-3.15）+6.6/（0.75-0.2）和 0.15/2.156 12.5/3.6-7/9+8.3/3.6这三道题的简算答案（递等式计算）

2*（18.5-3.15）+6.6/（0.75-0.2）派碧
=2*15.35+6.6/0.55
=30.7+22
=52.7

0.15/2.1*56
=0.15/0.3*56/7
=0.5*8
=4

12.5/3.6-7/9+8.3/3.6
=（尘拦举12.5-2.8+8.3）/3.6
=18/衡亮3.6
=5

2*（18.5-3.15）+6.6/（判野0.75-0.2）
=2*15.35+6.6/0.55
=30.7+22
=52.7

0.15/液前2.1*56
=0.15/0.3*56/7
=0.5*8
=4

12.5/3.6-7/9+8.3/3.6
=（12.5-2.8+8.3）/3.6
=18/3.6
=5

全手打的，求采纳。闹冲清

谢谢

这个都不会，你读几年级？