1. Ratio – Combining – Bingo Method
Students should choose nine answers from the grid and place them
randomly into a 3x3 square in their book.
You may want to pause your display and choose questions
according to difficulty during the game.
Depending on time, students could win with
a line, an X, or a ‘full house’ (all).

2. Printing To print handouts from slides -
Select the slide from the left. Then click:
File > Print > ‘Print Current Slide’
To print multiple slides -
Click on a section title to highlight all those slides,
or press ‘Ctrl’ at the same time as selecting slides to
highlight more than one. Then click:
File > Print > ‘Print Selection’
To print double-sided handouts -
Highlight both slides before using ‘Print Selection’.
Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

3. BINGO! 45 54 23 82 37 12 76 25 91
Combining
Ratios

4. Choose your numbers… 15 : 12 : 10 5 : 6 20 : 8 : 3 3 : 5 5 : 8
20 : 25 : 36
3 : 10
6 : 5 : 21
6 : 21 : 28
15 : 4
35 : 10 : 7
3 : 8
14 : 25
15 : 9 : 4
8 : 15
6 : 15 : 25
Draw a 3x3 grid in your book.

5. : : : ORANGE 4 GREY 9 PINK 5 3 ×3 15 9 PINK 15 GREY 9 ORANGE 4
In a box there are some cubes…
The ratio of pink cubes to grey cubes is 5:3
The ratio of orange cubes to grey cubes is 4:9
What is the ratio of pink cubes to grey cubes to orange cubes?
ORANGE 4
GREY 9 :
PINK 5 3 ×3 15 9 :
PINK 15
GREY 9 :
ORANGE 4

6. : : : GREEN 7 WHITE 2 6 BLACK 5 ×3 21 6 WHITE 6 BLACK 5 GREEN 21
In a bag there are some buttons…
The ratio of white buttons to black buttons is 6:5
The ratio of green buttons to white buttons is 7:2
What is the ratio of white to black to green buttons?
GREEN 7
WHITE 2 : 6
BLACK 5 ×3 21 6 :
WHITE 6
BLACK 5 :
GREEN 21

7. : : : : BLUE 5 GREEN 6 ORANGE 4 ×3 ×2 15 12 10 12 ORANGE 15 GREEN 12
In a bag there are some cubes…
The ratio of orange cubes to green cubes is 5:4
The ratio of blue cubes to green cubes is 5:6
What is the ratio of orange cubes to green cubes to blue cubes?
BLUE 5
GREEN 6 :
ORANGE 4 ×3 ×2 15 12 : 10 12 :
ORANGE 15
GREEN 12 :
BLUE 10

8. : : : : LIME 3 APPLE 4 CHERRY 5 1 ×3 15 3 CHERRY 15 LIME 3 APPLE 4
In a bag there are some sweets…
The ratio of cherry sweets to lime sweets is 5:1
The ratio of lime sweets to apple sweets is 3:4
What is the ratio of cherry sweets to apple sweets?
LIME 3
APPLE 4 :
CHERRY 5 1 ×3 15 3 :
CHERRY 15
LIME 3 :
APPLE 4
CHERRY 15
APPLE 4 :

9. : : : BLACK 8 BLUE 3 RED 5 2 ×4 20 8 RED 20 BLACK 8 BLUE 3
In a bag there are some pens…
The ratio of red pens to black pens is 5:2
The ratio of black pens to blue pens is 8:3
What is the ratio of red pens to black pens to blue pens?
BLACK 8
BLUE 3 :
RED 5 2 ×4 20 8 :
RED 20
BLACK 8 :
BLUE 3

10. : : : : YELLOW 3 PINK 5 BLACK 2 ×3 ×5 6 15 15 25 BLACK 6 YELLOW 15
In a bag there are some pens…
The ratio of black pens to yellow pens is 2:5
The ratio of yellow pens to pink pens is 3:5
What is the ratio of black pens to yellow pens to pink pens?
YELLOW 3
PINK 5 :
BLACK 2 ×3 ×5 6 15 : 15 25 :
BLACK 6
YELLOW 15 :
PINK 25

11. : : : : BLUE 3 PURPLE 2 GREEN 5 4 ×2 6 4 GREEN 5 PURPLE 4 BLUE 6 GREEN
In a bag there are some buttons…
The ratio of green buttons to purple buttons is 5:4
The ratio of blue buttons to purple buttons is 3:2
What is the ratio of green buttons to blue buttons?
BLUE 3
PURPLE 2 :
GREEN 5 4 ×2 6 4 :
GREEN 5
PURPLE 4 :
BLUE 6
GREEN 5
BLUE 6 :

12. : : : : : YELLOW 2 GREEN 3 BLUE 1 5 ×3 ×5 3 15 10 15 BLUE 3 GREEN 15
In a bag there are some cubes…
The ratio of blue cubes to green cubes is 1:5
The ratio of yellow cubes to green cubes is 2:3
What is the ratio of blue cubes to yellow cubes?
YELLOW 2
GREEN 3 :
BLUE 1 5 ×3 ×5 3 15 : 10 15 :
BLUE 3
GREEN 15 :
YELLOW 10
BLUE 3
YELLOW 10 :

13. : : : : SQ. 4 OCT. 3 TRI. 2 7 ×3 ×7 6 21 28 21 TRI. 6 OCT. 21 SQ. 28
In a bag there are some shapes…
The ratio of triangles to octagons is 2:7
The ratio of squares to octagons is 4:3
What is the ratio of triangles to octagons to squares?
SQ. 4
OCT. 3 :
TRI. 2 7 ×3 ×7 6 21 : 28 21 :
TRI. 6
OCT. 21 :
SQ. 28

14. : : : : YELLOW 9 GREEN 5 3 BLACK 1 ×3 9 3 YELLOW 9 BLACK 3 GREEN 5
In an aquarium there are some fish…
The ratio of yellow fish to black fish is 3:1
The ratio of yellow fish to green fish is 9:5
What is the ratio of black fish to green fish?
YELLOW 9
GREEN 5 : 3
BLACK 1 ×3 9 3 :
YELLOW 9
BLACK 3 :
GREEN 5
BLACK 3
GREEN 5 :

15. : : : SQUARE 10 REC. 7 ROUND 2 ×5 35 10 ROUND 35 SQUARE 10 REC. 7
In a box there are some biscuits…
The ratio of round biscuits to square biscuits is 7:2
The ratio of square biscuits to rectangular biscuits is 10:7
What is the ratio of round biscuits to
square biscuits to rectangular biscuits?
SQUARE 10
REC. 7 :
ROUND 2 ×5 35 10 :
ROUND 35
SQUARE 10 :
REC. 7

16. : : : : CIRCLES 3 TRIANGLES 4 REC. 5 6 ×2 6 8 REC. 5 CIRCLES 6
In a box there are some shapes…
The ratio of rectangles to circles is 5:6
The ratio of circles to triangles is 3:4
What is the ratio of rectangles to triangles?
CIRCLES 3
TRIANGLES 4 :
REC. 5 6 ×2 6 8 :
REC. 5
CIRCLES 6 :
TRIANGLES 8
REC. 5
TRIANGLES 8 :

17. : : : : : RED 3 GREEN 2 WHITE 1 4 ×3 ×4 3 12 12 8 WHITE 3 RED 12 GREEN
In a bag there are some cubes…
The ratio of white cubes to red cubes is 1:4
The ratio of red cubes to green cubes is 3:2
What is the ratio of white cubes to green cubes?
RED 3
GREEN 2 :
WHITE 1 4 ×3 ×4 3 12 : 12 8 :
WHITE 3
RED 12 :
GREEN 8
WHITE 3
GREEN 8 :

18. : : : : : BLACK 4 RED 3 WHITE 2 5 ×4 ×5 8 20 20 15 WHITE 8 BLACK 20
In a bag there are some pens…
The ratio of white pens to black pens is 2:5
The ratio of black pens to red pens is 4:3
What is the ratio of white pens to red pens?
BLACK 4
RED 3 :
WHITE 2 5 ×4 ×5 8 20 : 20 15 :
WHITE 8
BLACK 20 :
RED 15
WHITE 8
RED 15 :

19. : : : : FISH 9 DOGS 5 4 CATS ×5 ×4 20 25 36 20 DOGS 20 CATS 25 FISH 36
In a pet store there are some pets…
The ratio of dogs to cats is 4:5
The ratio of fish to dogs is 9:5
What is the ratio of dogs to cats to fish?
FISH 9
DOGS 5 : 4
CATS ×5 ×4 20 25 : 36 20 :
DOGS 20
CATS 25 :
FISH 36

20. : : : : : BLONDE 2 BROWN 5 BLACK 7 ×2 ×5 10 14 10 25 BLONDE 10 BLACK
In a school there are some students…
The ratio of blonde students to black-haired students is 5:7
The ratio of blonde students to brown-haired students is 2:5
What is the ratio of black-haired students to
brown-haired students?
BLONDE 2
BROWN 5 :
BLACK 7 ×2 ×5 10 14 : 10 25 :
BLONDE 10
BLACK 14 :
BROWN 25
BLACK 14
BROWN 25 :

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