Question

The cost of 2 kg of carrots is £7

Work out the cost of 5 kg of carrots.


quick because my hw is due tommorow

Answer 1

if 2kg is £7

5kg is £x

5×7= 35

35÷2= 17.50

5kg= £17.50

Answer 2

If the cost of 2kg of carrots is £7, to find 4kg we need to double this cost:

£7 x 2 = £14
4 kg = £14

To find the cost of 5 kg of carrots we must add another 1 kg, we can do this by halving £7 to find 1 kg and then adding the cost of 4 kg (£14) onto it:

£7 ÷ 2 = £3.50
£14 + £3.50 = £17.50

This means the cost of 5 kg of carrots will be £17.50