Ratio Problems
Solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts
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Set out your lesson
“If a recipe uses 3 eggs for every 200g of flour, can your child work out how many eggs would be needed for 600g of flour?”
Full guide and materials
- Activity. Solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts
What to notice. If the ratio of red to blue beads is 3:5 and there are 15 blue beads, find the number of red beads • Use multiplication facts to find the missing value: 'For every 2 apples there are 5 oranges; if there are 20 oranges, how many apples?' • Explain the multiplicative relationship between two quantities in a ratio context
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If a recipe uses 3 eggs for every 200g of flour, can your child work out how many eggs would be needed for 600g of flour?
Solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts
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Check understanding
- If the ratio of red to blue beads is 3:5 and there are 15 blue beads, find the number of red beads
- Use multiplication facts to find the missing value: 'For every 2 apples there are 5 oranges; if there are 20 oranges, how many apples?'
- Explain the multiplicative relationship between two quantities in a ratio context
“If a recipe uses 3 eggs for every 200g of flour, can your child work out how many eggs would be needed for 600g of flour?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Ratio & Proportion
- Age range
- Ages 10–11