Use representations to round a decimal number with tenths to the nearest whole number | Maths

Starter quiz

Which descriptions represent this image?

3 ones and 2 tenths ✓

32 tenths ✓

3.2 ✓

30.2
Represent the following picture as a decimal number.

'2.5' ✓
Tick the numbers that are multiples of 10.

23

30 ✓

70 ✓

84

100 ✓
Tick the missing numbers from the number line.

7.0

7.1 ✓

7.5 ✓

7.10

8 ✓
Order the numbers in ascending order.

1

⇔

0.9

2

⇔

1.2

3

⇔

5.3

4

⇔

5.8

5

⇔

9.5

6

⇔

10.3
Tick the numbers that round to 100 as the nearest multiple of 10.

90

98 ✓

107

102 ✓

95 ✓

Which of these are not multiples of one?

1

3.0

4.2 ✓

7.9 ✓

10
Look at the number line. Which two multiples of 1 is a between?

6 and 7

7 and 8 ✓

5 and 6

8 and 9
5 is the previous multiple of 1 and 6 is the next multiple of 1. Which letter on the number line could this statement refer to?

a

b

c ✓

d
7.1 is the number. Tick the pair of numbers that are the previous and next multiples of one.

7 and 8 ✓

6 and 8

8 and 9

7 and 7.2
What is 8.5 rounded to the nearest multiple of one?

'9' ✓
What is 17.2 rounded to the nearest multiple of one?

'17' ✓

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Pupils say the previous multiple of one as a whole before e.g. previous multiple of 3.4 as 2 or 2.4

Place the number on a number line and clarify the whole numbers it sits between.

Multiple - A multiple is the result of multiplying a number by an integer. For example 2 × 5 = 10 so 10 is a multiple of 2 and 5.
Next - Something that comes after something else.
Previous - Something that comes before something else.
Rounding - Rounding means making a number simpler but keeping its value close to what it was.