Scenarios

Scenario 1

At the car factory they need 4 wheels to make each car. How many cars can they make with 72 wheels? Stephanie said:

Nine 8’s are 72. So we double the 9 to get 18.

What stage is Stephanie at?

Scenario 2

You have 37 lollies and you eat 9 of them.

How many lollies do you have left?Arita says: The answer is 28 because four 9’s is 36, and 1 is 37. So the answer is three 9’s and 1, or 28.

What stage is this?

Scenario 3

There are 6 baskets. There are 24 muffins in each basket. How many muffins are there altogether? Tim says:

It’s six 25’s and you take away 6.

What stage is this?

Scenario 4

In a box of 240 tomatoes there are 65% that are ripe. How many tomatoes are ripe? Tom says:

Well 50% is 120, and 25% is 60, and 12.5% is 30.So it must be close to 150.

What stage is this?

Scenario 5

What is of 28?Steve says: I get 21 because half of 28 is 14 and half of 14 is 7. Then 7+7+7 = 21

What stage is this?

€

34