New
New
Year 1

Explain the difference between consecutive odd numbers

I can explain the difference between consecutive odd numbers.

New
New
Year 1

Explain the difference between consecutive odd numbers

I can explain the difference between consecutive odd numbers.

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Lesson details

Key learning points

  1. Consecutive odd numbers have a difference of 2
  2. We can use this knowledge to solve missing number problems when 2 is the known part.

Common misconception

Children may resort to counting strategies without noticing that the relationship between the minuend and the subtrahend is that there is a difference of two.

Draw out the patterns that will allow children to solve these equations without needing to using counting strategies. For example, 5 + 2 and 2 + 5 are 'odd number after'; 7 - 2 is 'odd number before' and 7 - 5 is 'difference of two'.

Keywords

  • Difference - The result of subtracting one number from another.

  • Odd - Any integer (not a fraction) that cannot be divided exactly by 2

  • Consecutive - Numbers which follow each other in order, without gaps, from smallest to largest.

The sequence of steps in this lesson are the same as those in that for finding the difference between consecutive numbers, but now we are exploring a difference of two rather than one.
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).

Video

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6 Questions

Q1.
What is the odd number before 9?
11
Correct answer: 7
9
5
Q2.
What is the missing number in the number pattern? 3 5 {} 9
1
6
Correct answer: 7
8
Q3.
Match these odd numbers with the odd number that comes before it.
Correct Answer:5,3

3

Correct Answer:3,1

1

Correct Answer:7,5

5

Correct Answer:9,7

7

Q4.
Who is correct?
An image in a quiz
Correct answer: Sam
Jacob
Q5.
What is the missing number?
An image in a quiz
Correct Answer: 2, two
Q6.
Jacob has 8 stickers. Sam has 2 fewer. How many stickers does Sam have?
10
8
Correct answer: 6
4

6 Questions

Q1.
What are the odd numbers before and after 7?
An image in a quiz
5 and 3
6 and 8
Correct answer: 9 and 5
Q2.
Which of these pairs of numbers are consecutive odd numbers?
4 and 6
Correct answer: 3 and 1
5 and 9
Q3.
Which equation is in the wrong place?
An image in a quiz
7 - 5
9 - 3
Correct answer: 5 - 2
Q4.
Which part part whole model matches the story so far? There were 7 cats. 5 of them were wearing hats. How many were not wearing hats?
An image in a quiz
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
Q5.
There were 7 children jumping on the bouncy castle. 5 children got off. How many children were left bouncing?
An image in a quiz
Correct Answer: 2, two
Q6.
Sam has 5 sweets. She gave some to her sister. Sam has 3 left. How many did she give to her sister?
3
4
Correct answer: 2
5