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Solve problems involving adjacent multiples of nine
I can solve problems involving adjacent multiples of nine.
Lesson 3 of 5
New
New
- Year 4
Solve problems involving adjacent multiples of nine
I can solve problems involving adjacent multiples of nine.
Lesson details
Key learning points
- Adjacent multiples of nine have a difference of 9 and alternate between odd and even numbers.
- If you add 9 to a multiple of nine you get the next multiple of nine.
- If you subtract 9 from a multiple of nine you get the previous multiple of nine.
Keywords
Adjacent multiple - An adjacent multiple is a multiple next to another. It could be before or after.
Common misconception
Pupils may find it difficult to solve problems or misunderstand questions.
Model clearly how to identify key phrases and words which will identify the operation and equation required for word problems. This could involve drawing bar models or other representations.
By this point fluency in 9 times tables will support children in solving these problems. Continue to chorally rehearse the 9 times tables.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which multiple of 9 is missing from this sequence?
45, , 63, 72
Which multiple of 9 is missing from this sequence?
45, , 63, 72
Q2.What is 12 × 9 =
What is 12 × 9 =
Q3.Which symbol goes in the gap to make this correct?
9 × 9 = 10 × 9 ___ 9
Which symbol goes in the gap to make this correct?
9 × 9 = 10 × 9 ___ 9
+
×
÷
Q4.Which symbol goes in the gap to make this correct?
2 × 9 = 3 × 9 ___ 9
Which symbol goes in the gap to make this correct?
2 × 9 = 3 × 9 ___ 9
+
×
÷
Q5.Complete: I know that 3 × 9 = 27 so 30 × 9 =
Complete: I know that 3 × 9 = 27 so 30 × 9 =
Q6.Complete: I know that 5 × 9 = 45 so 50 × 9 =
Complete: I know that 5 × 9 = 45 so 50 × 9 =
Assessment exit quiz
6 Questions
Q1.Lucas makes shapes using 9 sticks each time. He has made 3 shapes and used 27 sticks. Lucas makes another of the shapes. How many sticks has he used now?
Lucas makes shapes using 9 sticks each time. He has made 3 shapes and used 27 sticks. Lucas makes another of the shapes. How many sticks has he used now?
27
28
30
Q2.There are 7 flowers with 9 petals each. If Jun gives away one flower, how many petals will there be altogether? petals
There are 7 flowers with 9 petals each. If Jun gives away one flower, how many petals will there be altogether? petals
Q3.Lucas has filled 7 buckets with 9 litres of water ready for a water fight. Jun brings one more bucket of water with the same amount. How many litres of water have they used altogether? litres
Lucas has filled 7 buckets with 9 litres of water ready for a water fight. Jun brings one more bucket of water with the same amount. How many litres of water have they used altogether? litres
Q4.If 20 × 9 = 180 then 21 × 9 =
If 20 × 9 = 180 then 21 × 9 =
Q5.If 80 × 9 = 720 then 81 × 9 =
If 80 × 9 = 720 then 81 × 9 =
Q6.If 37 × 9 = 333 then 36 × 9 =
If 37 × 9 = 333 then 36 × 9 =
