36×25%=
12.6÷3=
7.3﹣3=
23×489≈
9.1+0.09=
x﹣1=0.2
x:=21:
50%x+x=15
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﹣)+]