Starter quiz
- What is the odd number before 9?
- 11
- 7 ✓
- 9
- 5
-
- What is the missing number in the number pattern? 3 5 {} 9
- 1
- 6
- 7 ✓
- 8
-
- Match these odd numbers with the odd number that comes before it.
- 5⇔3 ✓
- 3⇔1 ✓
- 7⇔5 ✓
- 9⇔7 ✓
Who is correct?- Sam ✓
- Jacob
-
What is the missing number?- '2' ✓
- Jacob has 8 stickers. Sam has 2 fewer. How many stickers does Sam have?
- 10
- 8
- 6 ✓
- 4
-
Exit quiz
What are the odd numbers before and after 7?- 5 and 3
- 6 and 8
- 9 and 5 ✓
-
- Which of these pairs of numbers are consecutive odd numbers?
- 4 and 6
- 3 and 1 ✓
- 5 and 9
-
Which equation is in the wrong place?- 7 - 5
- 9 - 3
- 5 - 2 ✓
-
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?
There were 7 children jumping on the bouncy castle. 5 children got off. How many children were left bouncing?- '2' ✓
- Sam has 5 sweets. She gave some to her sister. Sam has 3 left. How many did she give to her sister?
- 3
- 4
- 2 ✓
- 5
-
Worksheet
Loading worksheet ...
Presentation
Loading presentation ...
Video
Lesson Details
Key learning points
- Consecutive odd numbers have a difference of 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.
+