Construct a whole when given a part and the number of parts | Maths

Starter quiz

What is the missing label in this bar model?
- 'whole' ✓
Look at the sequence of months. Which season is missing?
- Spring
- Summer
- Autumn ✓
- Winter
What is the name of this shape?
- 'triangle' ✓
What is the name of this shape?
- Pentagon
- Hexagon ✓
- Square
- Oblong
Complete the sentence. 90 is made of ______ groups of 10
- '9' ✓
How many 10s are there in 50?
- '5' ✓

Exit quiz

Thinking about the parts, which of these wholes is the odd one out?
Thinking about the parts, which of these wholes is the odd one out?
Strip A is made up of 3 equal parts. Strip B is made up of 4 equal parts. Which strip is the longest?
- Strip A
- Strip B ✓
How many equal parts does each numeral have?
- '5' ✓
The curves and straights in the track are the same length. Which circuit is longer?
- 'B' ✓
The curves and straights in the track are the same length. Which circuit is longer?
- 'A' ✓

Worksheet

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Presentation

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Lesson Details

Key learning points

If you know one part and how many parts there are we can construct the whole.
If you know that the part is one out of 4 equal parts we can draw the whole.
The whole can be one shape or a group of objects.

Common misconception

Children might think that any shape they draw around or use is a whole and the new shapes they create represent lots of wholes joined together.

Ensure the children understand that a whole can be anything and can change as you add parts to it. A piggy bank is a good analogy for this as you are constantly adding money to the whole and it is made up of many parts.

Keywords

Whole - The whole is all the parts or everything, the total amount.
Part - A part is some of the whole.
Construct - Constructing something involves making something by joining parts together.