3.5+4.5=
=
3.6÷40%=
4r2-22=
2.01-0.1=
20×15%=
生产时间/时
0
1
2
3
4
5
6
7
产量/吨
8
12
16
20
①101×32
②2.74+8.67+7.26+11.33
③18.8﹣5.8﹣﹣4.2﹣
④×+÷
⑤0.888×125×73+999×3
⑥4﹣[3.75×(1.2﹣)+]