Measures

70kg 30kg 20kg 140g 60g

Problems With Measures Sally wants to put up three shelves in her kitchen. Each shelf is 80cm long. Wood is sold in 2m lengths. How much wood will she need to buy? How much wood will be wasted? These are mixed units, what needs to be converted? 2m = 200cm 200cm – 80cm = 120cm 120cm – 80cm = 40cm Sally can get two shelves from one piece of wood. She will waste 40cm. To make three shelves she needs to buy 2 pieces of wood. She will waste 40cm from the first piece of wood. And 120cm from the second piece. Total wastage 160cm.

Key Question How to read scales accurately?

Steps to Success I can use scales accurately. I know about different types of measuring equipment. I can read and record measureme nts.

1kg = 1000g ½ kg = 500g 1/4kg =250g Weight 10mm =1cm 100cm =1m 1000m = 1km Length ¼ of a litre =250ml ½ a litre = 500ml 1 litre =1000ml Capacity

Problems with Measures. A paper clip uses 3cm of wire. How many paper clips could I make from 60cm of wire ? 60cm ÷ 3cm = 20cm A race track is 100m long. Each lane is 75cm wide. There are six lanes. How wide is the race track? Ignore the length! We are looking for the width. 75cm x 6 = 450cm or 4m 50cm