1.45+15×6= 135

2.250÷5×8=400

3.6×5÷2×4=60

4.30×3+8=98

5.400÷4+20×5= 200

6.10+12÷3+20=34

7.(80÷20+80)÷4=21

8.70+(100-10×5)=120

9.360÷40+10= 19

10.40×20-200= 600

11.（80-25）*2= 110

12.70+45=115

13.90×2÷3= 60

14.16×6÷3= 32

15.300×6÷9= 200

16.540÷9×7=420

17.30×20÷15= 20

18.400÷4×7= 700

19.（350-80）÷9= 30

20.160+70+50=280

21.18-64÷8= 10

22.42÷6+20=27

23.40-5×7= 5

24.80+60÷3=100

25.41+18÷2= 50

26.75-11×5= 20

27.42+7-29= 20

28.5600÷80=70

29.25×16÷4= 100

30.120×25÷5= 600