1. 2018 Arithmetic

2. 1 1
6 7 3
3 9 +
+ 4 0 = 7 1 3
- 1 = 7 1 2 7 1 2
7 1 2

3. 5 11 5 11

4. 1
4 5 2 x
Double 4 0 = 8 0
Double 5 = 1 0 9
9 0

5. 8 3 8

6. 9 x 1 1 = 9 9 9

7. 5 x 4 =
2 0
2 0 x 1 0 =
2 0 0
2 0 0

8. 6
5 0 2 - 1 =
- 2 = 6 5 6 2

9. 6 x 6 = 3 6
= 4 6
4 6

10. 1 1
+ 2 5 = +
2 4.7
- 0.3 = 8 1 . 8

11. 3 0 8 =
3 0 8

12. . 9
2 7 ÷ 3 = 9 3
2 7 0
9 0 .

13. . . 6
5 4 ÷ 9 = 6 9
6 0 0 . .

14. 1 x = 1 5
2 x = 3 0
3 x = 4 5
4 x = 6 0 4

15. 4
8 5 5 - 1 4 9 2 1

16. 50 000

17. 9
1 0 1 .0 1
- 5 = 5 -
5.4
- 0.4 = 4.6 4 . 6
4.6

18. x3 5
1 5
1 5 3
1 8 = + = 7
2 1
2 1
2 1
2 1 x3
1 8
2 1

19. 0.1 . 1

20. 1 2 5
2 5 0 4 x 3 2 7 5
7 5 0

21. 1 1 2 1 1
2 3 5 5
1 5 7 1 8 5 5
18 055

22. 1 0 0
2 0
÷ =
1 2
1 2 x 2 0 =
2 4 0 . . 1 2 4 5 5 2
2 4 0

23. 1 5
4 3
1 x
+ 4 3
- 4 3 8 6
2 x 2 1 5
+ 4 3 1
1 2 9
3 x
+ 4 3 1 1 7 2
4 x
+ 4 3 2 1 5
5 x
1 5

24. 4
2 8
Half of 2 8 = 1 4
x 0.5
1 4 .
1 4

25. x5 x2 1 5 1 2 = = 2
1 0 5
1 0 x5 x2 5 2 7 7 + =
1 0
1 0
1 0
1 0

26. 3 3 6 2 + =
= 1 4 4 4 4 2
1 + 1 4 2 2 4

27. 7 3
1 0 + = 4 4 4
1 0 4

28. 5 9 9 6
.0 0 0 1 1 1
= 5.7 4
= 5.8 . 2 6 2
= 6

29. x10
÷10 2
3.9
3.9 x 3 = 1 1.7 x
1 1.7 x 1 0 = 1 1 7
1 1 7
3 9 x 3 = 1 1 7 .
1 1 7

30. x3 2 6 = 5
1 5 x3
1 6 6
1 0
1 0 - =
1 5
1 5
1 5
1 5

31. 3 1 2 2 1 1
3 2 4 7 8
4 3 3 4 4 6 5 5 1 8

32. 1
1 0 0
9 9
2 0 0 ÷ = 2
9 9 2 x
If 1% is 2
9 9% is
1 9 8
1 9 8

33. 1 4
x 2 1 8

34. ÷ 9 = =
7 7

35. 1 x 4 0 = 4 0 1 2
x 4 0 = 2
4 0
= 2 0
6 0

36. 3
x 4 0 =
1 2 0
1 2 0 ÷ 2 =
6 0 . . . . 2 2
6 0

37. 1 4
1 0 0
2 8
6 5 0 ÷ = .
6.5 6 . 5
x 2 8
5 2
1 3 1 8 2 .
1 8 2

38. 1 4
1 8 x7 x3 4 - 1 2
1 4 6
1 8
2 1
2 1 = = 3
2 1 7
2 1 x7 x3
3 5
1 8 3 - 1
2 1
2 1
1 7 2
2 1

39. 1 4
1 3 - 3 7 x7 x3 2
1 4
9 8
1 3
3 9
1 4 7 x = = 3
2 1 7
2 1 9 8 x7 x3
9 8
3 9
5 9
5 9 - =
2 1
2 1
2 1
2 1

40. 9 7
1 x 9 1
1 9 4
2 x
2 9 1
3 x
3 8 8
4 x 9 7
4 8 5
5 x
5 8 2
6 x
6 7 9
7 x
7 7 6
8 x
8 7 3
9 x
9 7 0
1 0 x
9 1