Securing understanding of ratio as a multiplicative relationship

12 questions

1. Use the ratio table to work out how many slices of cheese are needed to make 7 sandwiches. ___ slices.
2. Use the ratio table to work out how many slices of cheese are needed when there are 12 slices of tomato. ___ slices.
3. Here is a recipe for vanilla cake. How much sugar is needed if you use 6 eggs? ___ grams of sugar.
4. Here is a recipe for vanilla cake. How much vanilla is needed if you use 125 g of flour? ___ ml of vanilla.
5. Lucas has some red and blue marbles. For every 4 red marbles, he has 5 blue marbles. Lucas has 20 red marbles altogether. Lucas has ___ blue marbles.
6. Laura has some red and blue marbles. For every 4 red marbles, she has 5 blue marbles. She has 36 marbles altogether. Laura has ___ blue marbles.
7. A ratio shows the relative sizes of 2 or more values and allows you to compare a part with another part in a whole. The relationship between parts and/or the whole is always ___.
8. A robot in travelling around a toxic planet. The protective clothing is heavy, so for every 6 protective items, there must be 2 batteries. Match the equipment list to its effect on the robot.
9. To make a "Sunrise" orange paint, 2 cans of yellow paint for every 1 can of red paint is used. Match the paint shades to the recipes.
10. To make lemonade, 1 lemon and 2 tablespoons of sugar are used for every 500 ml of water. Jun uses 750 ml of water to make lemonade. Jun should use ___ tablespoons of sugar.
11. Select all the statements that are correct.
12. "Choko Milk chocolate" bars are made with 2 parts cocoa, 5 parts milk powder and 1 part sugar. Too much cocoa makes it too bitter, too much sugar makes it too sweet. Match each result with its recipe

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