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I need 20 math problems in elementary arithmetic and 20 simple math problems in sixth grade.
Basic arithmetic

0.25×8.6×4

89+456-78

5%+.3/7 × 49/9 - 4/3

9 × 15/36 + 1/27

2× 5/6 – 2/9 ×3

3× 5/4 + 1/4

94÷ 3/8 – 3/8 ÷6

95/7 × 5/9 + 3/7 × 5/9

6/2 -( 3/2 + 4/5 )

8 + ( 1/8 + 1/9 )

8 × 5/6 + 5/6

1/4 × 8/9 - 1/3

10 × 5/49 + 3/ 14

1.5 ×( 1/2 + 2/3 )

2/9 × 4/5 + 8 × 1 1/5

3. 1 × 5/6 – 5/6

4/7 - ( 2/7 – 10/2 1 )

19 × 18 – 14 × 2/7

5 × 25/ 16 + 2/3 × 3/4

4 × 8/7 – 5/6 × 12/ 15

Simple calculation problem

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+ 10= 19

10.40×20-200= 600

1 1.(80-25)*2= 1 10

12.70+45= 1 15

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