New
New
Year 5

Multiply tenths with whole numbers

I can use known multiplication facts and unitising to multiply tenths with whole numbers.

New
New
Year 5

Multiply tenths with whole numbers

I can use known multiplication facts and unitising to multiply tenths with whole numbers.

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Lesson details

Key learning points

  1. There are 10 tenths in one whole.
  2. Unitising can help to multiply tenths by whole numbers.
  3. Multiplication of tenths can be represented as repeated addition of tenths.
  4. ‘___ times ___ ones is equal to ___ ones so ___ times ___ tenths is equal to ___ tenths’ supports us to multiply tenths.

Common misconception

Children may incorrectly write the amount of tenths e.g. 49 tenths may be written as 0.49

There are ten tenths in one whole. So e.g. 49 tenths is composed of 4 ones and 9 more tenths. We write this as 4.9

Keywords

  • Tenth - One-tenth is one part in ten equal parts.

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).

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6 Questions

Q1.
Continue this sequence: 8 ones, 9 ones, 10 ones, ___ ones
Correct Answer: 11, eleven
Q2.
Match the equations to their sum.
Correct Answer:3 + 3 + 3 =,9

9

Correct Answer:5 + 5 =,10

10

Correct Answer:2 + 2 + 2 + 2 =,8

8

Correct Answer:4 + 4 + 4 + 4 =,16

16

Correct Answer:6 + 6 + 6 =,18

18

Q3.
Match the factors to their product.
Correct Answer:9 × 4 =,36

36

Correct Answer:6 × 4 =,24

24

Correct Answer:8 × 4 =,32

32

Correct Answer:0 × 4 =,0

0

Correct Answer:1 × 4 = ,4

4

Q4.
0.5 cm = mm
Correct Answer: 5, five
Q5.
Match the equation to the missing factor.
Correct Answer:3 × ___ = 21,7

7

Correct Answer:4 × ___ = 12,3

3

Correct Answer:___ × 5 = 30,6

6

Correct Answer:___ × 2 = 18,9

9

Correct Answer:7 × ___ = 56,8

8

Q6.
Which of these are multiples of six?
Correct answer: 12
28
Correct answer: 36
46
62

6 Questions

Q1.
What comes next in this sequence? 0.8, 0.9, 1.0, ?
Correct Answer: 1.1, 11 tenths
Q2.
How many tenths is 0.5 composed of?
Correct Answer: 5, five
Q3.
If 7 × 8 = 56, what does 7 × 0.8 equal?
560
56
Correct answer: 5.6
0.56
Q4.
Match the equation to its answer.
Correct Answer:4 × 0.9 =,3.6

3.6

Correct Answer:5 × 0.5 = ,2.5

2.5

Correct Answer:3 × 0.7 = ,2.1

2.1

Correct Answer:0.1 × 1 = ,0.1

0.1

Correct Answer:0 × 0.9 = ,0

0

Q5.
Lucas is making a line of marbles. Each marble is 0.8 cm long. How long could it be?
Correct answer: 3.2 cm
2.2 m
Correct answer: 1.6 cm
1.2 cm
Correct answer: 8 cm
Q6.
Sofia has a blue ribbon that is six metres long. She also has a red ribbon that is two-tenths times the length of the blue ribbon. How long is the red ribbon? m
Correct Answer: 1.2, 1.2 m