0.2km2=m2
6500mL=L
1.7吨=吨 千克
+ = 50÷50%= = 3 -1.125=
1.9÷2.5÷0.4= ( )×18= = 1- =
营业时间
11:00~14:30
17:00~21:40
1.2×2= 20×33%= 31×299≈
0.4÷8= + = 631÷9≈
89 370 10.1×37