GCSE Higher Revision Starters 5

Grade C – Adding and subtracting fractions

2/5 + 1/2

6/7 - 3/4

2/11 + 2/7

5/9 - 3/8

9/10

3/28

36/77

13/77

Grade C Number – Fractions

Simon eats 3/8 of a box of chocolates and George eats 2/3 of what was left. What fraction of the box of chocolates if left after Simon and George have finished?

Use 24 as the numberSimon eats 3/8 of 24 = 9 so 15 are left.George eats 2/3 of 15 = 10So 19 eaten altogether and 5 are leftFraction that is left is 5/24

Grade D/C Algebra – Expand and simplify

Show that 5(2x + 3y) + 7(x – 2y) = 17x + y

Expand and simplify (3x + 4)(x – 5)

Show that 2x(6x + 3) + 3x(x + 5) = 15x² + 21x

10x + 15y + 7x – 14y

12x² + 6x + 3x² + 15x

3x² + 4x – 15x – 20

3x² – 11x – 20

Grade B Number

A box weighs 150g to the nearest 10g. The contents of the box weigh 875g rounded to 3 significant figures.

What is the maximum weight of 20 identical boxes, giving your answer in kg?

UB of box = 155g

UB of contents = 875.5g

Max weight of 1 box = 1030.5g

Max weight of 20 boxes = 20610g = 20.61kg