Seed Packets

1
Seed Packets
I am learning to solve simple ratio problems by
repeated copying.
Compare one amount to another.
e.g. a packet of sweets contains 2 blue sweets
for every 3 green sweets.
23
2
Chocco biscuits contain 2 Dark Chocolate biscuits
and 3 White Chocolate biscuits in every pack. Use
this information and the table below to work out
how many White Chocolate biscuits we will have if
we buy ten packs?
1
2
3
4
5
6
7
8
9
10
Packets
The first 3 packs have been recorded for you.
2
4
6
Dark Choc
8
10
12
14
16
18
20
3
6
9
White Choc
27
30
24
21
18
15
12
Complete the Dark Chocolate line of the table by
recoding how many dark chocolate biscuits we will
have in total with every extra pack.
Now complete the White Chocolate line of the
table.
You can see that if we had ten packs of biscuits
we would have 20 Dark Chocolate biscuits and 30
White Chocolate Biscuits.
The ratio of Dark Chocolate to White chocolate
biscuits is 2 3
3
A school has 10 packs of tennis balls. 5 tennis
balls in each pack are red and 4 in each pack are
purple. Use this information to complete the
table below.
1
2
3
4
5
6
7
8
9
10
Packets
The first 3 packs have been recorded for you.
5
10
15
Red
20
25
30
35
40
45
50
4
8
12
Purple
36
40
32
28
24
20
16
Can you think of a way we could quickly work out
how many red tennis balls there are in ten packs
if we know the ration of red balls to purple to
ball is 54?
5 X 10 50
Total number of red balls
Number of red balls in each pack.
Number of packs
4
Now lets try and example without a full table.
The ratio of red tennis balls to purple tennis
balls is 64
1
2
10
20
100
Packets
Can you think of how we can work out how many red
tennis balls there will be in ten packs without
adding sixes?
6
12
Red
60
120
600
4
8
Purple
40
400
40
Now work out how many purple balls there must be.
6 X 10 60
How can we work out how many red tennis balls
there must be in 20 packs and 100 packs.
6 X 100 600
6 X 20 120
Now work out how many purple tennis balls there
must be in 20 packs and 100 packs.
5
Now try these questions on your own.
Click again when you have worked out all your
answers.
1) Every container has 3 red balls and 2 green
balls. There are 20 containers. How many green
balls are there in total? 2) Every container
has 2 red balls and 5 green balls. There are 20
containers. How many green balls are there in
total? 3) Every container has 1 red balls and 4
green balls. There are 25 containers. How many
green balls are there in total? 4) Every
container has 6 red balls and 3 green balls.
There are 7 containers. How many green balls are
there in total?
40
100
100
21
Need some more practise? Try Pg24 25 of Teacher
Tools Fractions, Decimals and Percentages Book
Numeracy resources