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Presentation transcript:

Whiteboardmaths.com © 2007 All rights reserved

Teacher Notes This presentation uses the term “weight” throughout. This is mainly for the benefit of primary/elementary school teachers as the younger children at primary school are not introduced to the concept of mass. Teachers who wish to use mass should simply use the Edit/Replace All command. Most of the work has focused on a 1kg scale (first 23 slides) with a variety of problems and it is likely that you will want to cover this sequentially. After this an extra 32 slides have been added that give a choice of different scales/subdivisions. There are 8 new scales each giving 4 examples. They are ½ kg, 400 g, 600 g, 800 g, 1 kg (different to the first), 2 kg, 4 kg and 5 kg. It is likely that you will want to dip in and out of these as you see fit depending on your class.

1 kg grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 400 grams Parcels

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 700 grams

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 500 grams

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 900 grams

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 450 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post. Teddies

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 150 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 750 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 300 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 1 kg She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

Group grams grams grams grams grams a b c d e Which parcel is the heaviest and how much does it weigh? b 850 g

grams grams grams grams grams a b c d e Which parcel is the lightest and how much does it weigh? e 150 g

grams grams grams grams grams a b c d e How much heavier is parcel (c) then parcel (a)? 500 – 300 = 200 g

grams grams grams grams grams a b c d e How much heavier is parcel (d) than parcel (e)? 250 – 150 = 100 g

grams grams grams grams grams a b c d e Put the parcels in order of weight, lightest to heaviest. edacb

Worksheet

300 g ? g grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 700 – 300 = 400 g Pairs

400 g ? g grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 900 – 400 = 500 g

400 g ? g grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object – 400 = 600 g

200 g ? g grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 500 – 200 = 300 g

250 g ? g grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 500 – 250 = 250 g

350 g ? g grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 750 – 350 = 400 g

500 g scale grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 75 grams 500

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 225 grams 500

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 375 grams 500

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 450 grams 500

400 g scale grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 80 grams 400

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 160 grams 400

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 220 grams 400

grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 340 grams 400

600 g scale grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 120 grams 600

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 240 grams

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 330 grams

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 510 grams

800 g scale grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 160 grams 800

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 320 grams

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 560 grams

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 720 grams

1 kg scale (New) kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 300 grams

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 450 grams kg

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 700 grams kg

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 950 grams kg

2 kg scale ½ 1 1½ 2 kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 600 g

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? ½ 1 1½ 2 kg 1 kg 100 g

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? ½ 1 1½ 2 kg 1 kg 400 g

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? ½ 1 1½ 2 kg 1 kg 800 g

4 kg scale kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 1 kg 200 g

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 2 kg 200 g kg

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 2 kg 800 g kg

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 3 kg 600 g kg

5 kg scale kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 750 g 4

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 2 kg 500 g kg 4

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 3 kg 250 g 5 kg

0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 4 kg 750 g 5 kg