1. Calculate!
3 X ÷ 2 8 ? 19 ?

2. CALCULATION RULES

3. Order of calculation
BODMAS

4. B – Brackets. Work out anything in brackets first
B – Brackets. Work out anything in brackets first. If there is more than 1 brackets  work from the outside to the inner
O – Of, Change ‘of’ to ‘X’ and work it out
D – Divide
M – Multiply . When there are only x and ÷ sign in a sum, you can work in any order
A – Add
S – Subtract. When there are only + and – signs in a sum, you can work in any order.

5. 18 – 14 ÷ (3 + 4) + 2 x 3
B  18 – 14 ÷ x 3 ÷ and x  18 – and +  22

6. Exercise 1 (16 – 10) ÷ 2 (8 – 1 + 2) x 0 + 40 16 – 10 ÷ 2
[(5 + 30) ÷ ] ÷ 3
(4 + 3 ) x 2
5 – [8 x (0-6) + 20]
(14 – 5) ÷ (20 – 2 )
8 + [4 x ( 11-13)]
÷ 11
86 + [(1+1) ÷ (-3)]
5 x ÷ 2
[(2+7) x (0+1) – 11] x 3
2 + 5 ÷ 3 x 6
[(30 ÷ ) x 5 – 5] ÷12
12 x (7-6) ÷ 6

7. (16 – 10) ÷ 2

8. 16 – 10 ÷ 2

9. (4 + 3 ) x 2

10. (14 – 5) ÷ (20 – 2 )

11. ÷ 11

12. 5 x ÷ 2

13. 2 + 5 ÷ 3 x 6

14. 12 x (7-6) ÷ 6

15. (8 – 1 + 2) x

16. [(5 + 30) ÷ ] ÷ 3

17. 5 – [8 x (0-6) + 20]

18. 8 + [4 x ( 11-13)]

19. 86 + [(1+1) ÷ (-3)]

20. [(2+7) x (0+1) – 11] x 3

21. [(30 ÷ ) x 5 – 5] ÷12