是个 ;五一班女生占全班人数的.
28×4= 113×7= 86-28= + =
+ = 1300-400= 5600-700= =
- = 820+280= 410+3090= 52÷4=
55÷5= 63×4= 201×8= 304×6=
- = - = - = + = + =
1- = + = - = + = - =
60×30= 86×11≈ 5.5+4.5= 4.3+3.1= 17.8-6.8=
12.9-0.4= + = + = 1- = - =
= 24×60= 7×7﹣7÷7= =
104×2= 2700÷9= 25×40= 48÷6=
20×7= 34×2= 180×2= 400×8= 54+26=
0+29= 3500﹣3000= + = 1﹣ = ﹣ =
= = = =