1. A D S U B T R C I N G

2. THE ORDER OF WORK
1. Isolate terms
2. Work out anything in brackets
3. Work out each term
4. Add and subtract from left to right.

3. TERMS
A term of an algebraic expression is a piece that belongs together.
Terms are separated by plus or minus signs.
The plus or minus sign is the start of the new term and is a part of that term.
Plus or minus signs inside brackets (including fraction lines) do not count.

4. 5 4 a 10 ?
× 2
– 7 17 8 a 10 ?
– 7
× 2

16. Magic Squares 6 1 8 7 5 3 2 9 4

17. Magic Squares 1. 2. 3. 4. 5. 6. 7. 8. 9.

18. 1. 2x x – 2
(1 – x)
3. 6(3x + 4) + 10(5 – x) + 2(x – 30)
4. 5(2x + 3) + 7(4 – x) + 8(2x – 4) + 10(1 – x) – 3x
5. 3(x + 2) + 2(x + 1)
6. (7 – 3)(x + 1) + (x – 2)5 – (3 + 2) × x +
(4x – 2) – 12x
8. 7(2x + 1)
9. 7(2x + 5) – 13x – 20

19. 1. 9x +1
2. 9 – 4x
3. 10x + 14
4. 6x + 21
5. 5x + 8
6. 4x - 5
7. 2
8. 14x + 7
9. x + 15