Recognising the relationship between addition and subtraction

Recognising the relationship between addition and subtraction

Lesson details

Key learning points

  1. In this lesson, we will explore how addition and subtraction are linked, and how a part whole relationship can produce related facts.

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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3 Questions

Q1.
First, there were six ladybirds. Then, two of them flew away. How many ladybirds were left?
Correct answer: 4
5
8
Q2.
The farmer owned seven sheep. Five were inside the pen. How many were outside the pen?
Correct answer: 2
6
7
Q3.
There were nine fish in the tank. The, one jumped out of the tank! How many fish were left in the tank?
3
5
Correct answer: 8

3 Questions

Q1.
This part whole model can be expressed as 7 - 3 = 4. Choose the other subtraction equation that can be written from this part whole model.
7 - 0 = 7
7 - 1 = 6
Correct answer: 7 - 4 = 3
Q2.
There are five elves standing up, and two elves sitting down. Altogether, there are seven elves. This can be written as an equation: 5 + 2 = 7. How else can this equation be written?
1 + 6 = 7
Correct answer: 2 + 5 = 7
7 = 3 + 4
Q3.
This part whole model can be expressed as 1 + 6 = 7. Choose the other addition equation that can be written from this part whole model.
2 + 5 = 7
3 + 4 = 7
Correct answer: 6 + 1 = 7

Lesson appears in

UnitMaths / Addition and subtraction within 10