Solve problems using a bar model to represent a whole partitioned into two parts | Maths

Starter quiz

Which one of these is showing a bar model?
What is the missing part?
- 1 ✓
- 2
- 3
Which bar model is showing Sofia’s counters correctly partitioned?
Jun has 3 cubes and Sofia has 1 cube. Which bar model is showing their cubes combined?
Jun has 2 counters and Sofia has 1 counter. Which bar model is showing their counters combined?
Jun is working systematically to find all the ways to partition 3 counters. What does systematically mean?
- Finding an order to partition the 3 counters. ✓
- Partitioning the counters in any order.

Jun and Sofia have thrown 5 counters. Which bar model is showing their counters?
Jun and Sofia have thrown 4 counters. Which bar model is showing their counters?
How many more fingers does Sofia need to show?
- 2
- 3 ✓
- 5
How many more fingers does Jun need to show?
- 2 ✓
- 3
- 4
Which set of counters will come next if we are working systematically?
Which bar model represents the next set of counters if we are working systematically?

Partitioning of numbers to five can be represented using the bar model.
The bar model and the part-part-whole diagram can be used to represent stories.
Systematic thinking can be used to ensure all possible responses to a problem can be found.

As before, children may confuse the whole and the parts, or add them all up to find the total.

Place objects in each part of the bar model and combine them to make the whole, or starting within the whole, partition them into the parts.

Partition - Partition is to split a whole up into parts.
Combine - Combine means to put parts together to make a whole.
Bar model - A bar model is a pictorial representation of a problem where bars are used to represent the whole and the parts.