16. D ×9 -D +6
A. 27
B. 29
C. 30
D. 32

17. 42÷D - 4 × D
A. 2
B. 4
C. 6
D. 8

18. 9÷3×2
A. 4
B. 6
C. 8
D. 10

19. 20- 2×6 ÷3
A. 20
B. 18
C. 16
D. 14

20. 9×5 - 8 +5
A. 37
B. 40
C. 42
D. 45​

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