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Complete works of oral arithmetic problems in the fourth grade of mathematics
The math oral calculation questions in the second volume of the fourth grade of primary school are as follows:

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=2 1

8、70+( 100- 10×5)= 120

9、360÷40= 9

10、40×20= 800

1 1、80-25= 55

12、70+45= 1 15

13、90×2= 180

14、 16×6= 96

15、300×6= 1800

16、540÷9=60

17、30×20= 600

18、400÷4= 100

19、350-80= 270

20、 160+70=230