Subtraction Breaking Apart Year 1 Addition and Subtraction Learning Video Clip

Step 13: Subtraction Breaking Apart Year 1 Addition and Subtraction Learning Video Clip

Dot and Stan are having a fantastic day playing in the sunshine! Use your knowledge of subtraction (breaking apart) to help them work out some tricky problems.

More resources for Autumn Block 2 Step 13.

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Discussion points for teachers

1. Write a calculation in words to show this.
Discuss how many grey pterodactyls there were. Discuss how many brown pterodactyls there were. Discuss which pterodactyls have flown away. Discuss how many pterodactyls are left. Discuss how we would write this into a calculation in words.
nine – six = three

2. Help Dot and Stan to work out how many ants are left by completing the calculation in words.
Discuss how many ants there were altogether. Discuss how many ants were big. Discuss how many ants were small. Discuss how many ants walk away first. Discuss how many more ants walk away. Discuss how we would show this in a calculation. Discuss how we would write the calculation in words.
seven – four – one = two

3. Write a calculation to show how many leaves Dot has eaten. Discuss how many leaves there were to begin with.
Discuss how many leaves Dot has eaten. Discuss how many leaves are left. Discuss how we would show this in a calculation.
10 – 5 = 5

4. Write a new calculation to show how many ferns Dot and Stan have eaten altogether.
Discuss how many ferns Stan has eaten. Discuss how how many ferns Dot ate. Discuss how we would show these numbers in a calculation. Discuss what the new answer would be.
10 – 5 – 0 = 5

5. Write a subtraction calculation to show which groups of stones they could have taken away.
Discuss what the different groups of stones could be (smooth, spiky, big, small, small spiky, big, spiky, small smooth, big smooth). Discuss how we could take one of these groups away from the total number of stones. Discuss how we would show this in a calculation. Discuss how we could take two groups away from the total. Discuss how we would show this in a calculation. This question is open-ended for the children to explore.
Various answers, for example: all of the stones – all of the smooth stones (10 – 5 = 5); all of the stones – all of the spiky stones ( 10 – 5 = 5)

National Curriculum Objectives

Mathematics Year 1: (1C2b) Read, write and interpret mathematical statements involving addition (+), subtraction (–) and equals (=) signs

Mathematics Year 1: (1C1) Represent and use number bonds and related subtraction facts within 20

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