共30题用时5分钟
400÷8=
22×4=
23-18=
75+34=
200×4=
57+33=
54+17=
840÷4=
12×3=
6×( )= 36
35÷7 =
( )×5 = 30
72÷8=
27÷8 =
37÷4 =
21÷4 =
28÷9=
36÷9 =
( )×4 = 36
5×( )= 25
61÷7 =
48÷9 =
9×( )= 72
39÷9 =
( )×2 = 6
24÷4=
72÷9 =
67-54=