New
New
Year 4

Solve problems involving adjacent multiples of nine

I can solve problems involving adjacent multiples of nine.

New
New
Year 4

Solve problems involving adjacent multiples of nine

I can solve problems involving adjacent multiples of nine.

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Lesson details

Key learning points

  1. Adjacent multiples of nine have a difference of 9 and alternate between odd and even numbers.
  2. If you add 9 to a multiple of nine you get the next multiple of nine.
  3. If you subtract 9 from a multiple of nine you get the previous multiple of nine.

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.

Keywords

  • Adjacent multiple - An adjacent multiple is a multiple next to another. It could be before or after.

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 (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.
Which multiple of 9 is missing from this sequence? 45, , 63, 72
Correct Answer: 54
Q2.
What is 12 × 9 =
Correct Answer: 108
Q3.
Which symbol goes in the gap to make this correct? 9 × 9 = 10 × 9 ___ 9
+
Correct answer:
×
÷
Q4.
Which symbol goes in the gap to make this correct? 2 × 9 = 3 × 9 ___ 9
+
Correct answer:
×
÷
Q5.
Complete: I know that 3 × 9 = 27 so 30 × 9 =
Correct Answer: 270
Q6.
Complete: I know that 5 × 9 = 45 so 50 × 9 =
Correct Answer: 450

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?
27
28
30
Correct answer: 36
Q2.
There are 7 flowers with 9 petals each. If Jun gives away one flower, how many petals will there be altogether? petals
Correct Answer: 54
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
Correct Answer: 72
Q4.
If 20 × 9 = 180 then 21 × 9 =
Correct Answer: 189
Q5.
If 80 × 9 = 720 then 81 × 9 =
Correct Answer: 729
Q6.
If 37 × 9 = 333 then 36 × 9 =
Correct Answer: 324