Step 7 Objective
Divide a quantity into two or more parts in a given ratio; use the unitary method to solve simple word problems involving ratio and direct proportion.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
If the ratio of boys to girls in a class is 3 : 1, could there be exactly
30 children in the class?
Why?
Could there be 25 boys?
Why?
5 miles is about the same as 8 km. Can you make up some conversion questions
that you could answer mentally?
Can you make up some conversion questions for which you would have to use
a more formal method?
How would you work out the answers to these questions?