# Order of operations and formulae

> Grade 6: brackets first, multiply and divide before add and subtract, work out a simple formula, letters standing for numbers, missing number equations.

Source: https://olyclass.com/library/math-g6-order-of-operations-en/

- Subject: Math
- Level: Grade 6
- Practice: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=math-g6-order-of-operations-en
- Copy and edit it: https://olyclass.com/library?copy=math-g6-order-of-operations-en
- Games it plays well in: [Three in a Row](https://olyclass.com/classroom-games/three-in-a-row/), [Line of Four](https://olyclass.com/classroom-games/line-of-four/), [Team Bingo](https://olyclass.com/classroom-games/team-bingo/), [Memory Match](https://olyclass.com/classroom-games/memory-match/)

## Questions

1. What is (6 + 4) × 3? (12 / 18 / 22 / 30)
   Answer: 30
2. What is 20 − (8 + 2)? (10 / 14 / 30 / 6)
   Answer: 10
3. In 5 × (3 + 2), you work out the brackets first, so the answer is 25.
   Answer: True
4. What is 4 + 3 × 5? (19 / 23 / 27 / 35)
   Answer: 19
5. What is 18 − 12 ÷ 3? (14 / 15 / 2 / 6)
   Answer: 14
6. 2 + 6 × 4 has the same value as (2 + 6) × 4.
   Answer: False
7. What is (15 − 3) ÷ 4 + 2? (11 / 3 / 5 / 8)
   Answer: 5
8. A formula is area = length × width. What is the area when length is 7 and width is 4? (11 / 14 / 22 / 28)
   Answer: 28
9. If n = 5, what is the value of 3n + 2? (10 / 17 / 32 / 35)
   Answer: 17
10. If a = 6 and b = 3, what is the value of a − b + 10?
   Answer: 13
11. In the expression 4x, what does the letter x stand for? (A bracket / A number / A shape / A unit only)
   Answer: A number
12. What is 2 × (9 − 4) + 3 × 4?
   Answer: 22
13. Which number makes this true: 7 + ? = 15? (22 / 7 / 8 / 9)
   Answer: 8
14. Find the missing number: 4 × ? − 3 = 17
   Answer: 5
15. If y + 9 = 20, then y = 11.
   Answer: True
16. The perimeter of a square is P = 4 × s. What is s when P = 36? (144 / 32 / 8 / 9)
   Answer: 9