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MathsYear 1Autumn Block 2 (Addition and Subtraction)15 Counting Back › Counting Back Year 1 Addition and Subtraction Learning Video Clip

# Counting Back Year 1 Addition and Subtraction Learning Video Clip ## Step 15: Counting Back Year 1 Addition and Subtraction Learning Video Clip

Dot the Dinosaur is surprising her mum with some presents but needs your help of counting backwards. Help Dot prepare her presents so that she can make this the best day ever!

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1. How many mangoes are left on the tree?
Discuss the start and end of the number line shown. Which number do we start counting back from? How many do we need to count back? How do you know?
3

2. Is she correct?
Discuss how many numbers we counted back from. Which number did we land on? Is 4 correct? What do you think Dot has done wrong?
No, there are only 3 mangoes left.

3. How many berries are left on the bush?
Discuss the numbers shown on both ends of the number line. Which number do we need to start on now? Do we need to start from 10? Why? How many do we need to count back?
2

4. What mistake has she made?
Discuss how many Dot has counted back from – is it too many or not enough?
Dot is incorrect – she has taken one extra away.

5. How many leaves could be left on the tree?
Discuss the numbers shown on both ends of the number line. Which number do we need to start on now? Do we need to start from 10? Why? Which numbers on the number line would meet follow Dot’s clue? This question is open-ended for the children to explore.
There could be 4, 3, 2 or 1 leaves left.

6. What subtraction calculation could Dot use to show how many apples she has picked?
Discuss how the number used for counting back can be transferred into a subtraction calculation. Does it matter which numbers go where? What would the calculation look like if there are no apples left? This question is open-ended for the children to explore.
7 – 4 = 3, 7 – 5 = 2 or 7 – 6 = 1 or 7 – 7 = 0

7. How many apples are left now?
Discuss the numbers shown on both ends of the number line. Which number do we need to start counting back from now? Which number would we land on?
0

8. How can this be shown as a subtraction calculation?
Discuss the calculation from above – how would we convert this into a subtraction calculation?
3 – 3 = 0

National Curriculum Objectives

Mathematics Year 1: (1N2c) Read and write numbers from 1 to 20 in numerals and words

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