New
New
Year 1

# Combine parts using the addition symbol

I can partition a whole in different ways and use an addition symbol when recombining them.

New
New
Year 1

# Combine parts using the addition symbol

I can partition a whole in different ways and use an addition symbol when recombining them.

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## Lesson details

### Key learning points

1. When a whole is partitioned into parts, it can be represented using the addition symbol.
2. The addition symbol shows that the parts combine to make the whole.
3. We can describe the parts to help us understand how to represent them.
4. A whole group can be partitioned in different ways.

### Common misconception

Children may have difficulty understanding partitioning of the whole group where one part is zero.

Include contexts with zero, so children can discuss and clarify their thinking.

### Keywords

• Partition - To split a whole up / to separate a whole into parts.

• Parts - A piece or section of a whole.

• Whole - All of something. Complete.

• Plus - Another word for add. The symbol is +.

• Combine - To put parts together to make a whole.

Introduce expressions involving symbols as a way to represent numerical situations and mathematical stories. Use quantities within 10, and support with manipulatives or images, focusing on mathematical structures, not working out solutions.
Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
Which picture shows Sofia’s whole group of cakes.
Correct Answer: An image in a quiz
Q2.
Look at the picture. How many pieces of fruit are in the whole group?
6
2
Q3.
Which part-part-whole model correctly represents this stem sentence? 5 is the whole, 1 is a part and 4 is a part.
Correct Answer: An image in a quiz
Correct Answer: An image in a quiz
Q4.
Which of the following is correct?
Correct answer: 8 is the whole. 2 is a part and 6 is a part.
6 is the whole. 2 is a part and 8 is a part.
2 is the whole. 6 is a part and 8 is a part.
Q5.
Which one of these numbers cannot be a part of the whole in the picture shown?
3
4
Q6.
Complete the stem sentence 7 is the whole: 2 is a part and is part.

## Exit quiz

### 6 Questions

Q1.
There are 3 large cars and 4 small cars. We can represent this as...
3 + 7
7 + 4
Q2.
Jacob has some chocolate cakes and some cherry cakes (plain with a cherry on top). He represents them like this, 4 + 2. What does the 4 represent?
the cherry cakes
the whole group
Q3.
Sofia represents this picture like this, 3 + 4. Match each numeral or symbol to the correct description of what it represents.

the cups with juice

Correct Answer:+,the parts combine to make the whole

the parts combine to make the whole

the empty cups

Q4.
Which pictures represents 7 + 2
Correct Answer: An image in a quiz
Correct Answer: An image in a quiz
Q5.
Use numerals and the plus sign to represent the fingers held up in this picture.