Explain how many '100s' and '200s', 1,000 is composed of | Maths

Starter quiz

Sofia partitions 100 into five equal parts. All parts have an equal value. What is the value of each part?

'20' ✓
Which of the following could complete the sentence? If I know 10 ÷ 5 = 2, then I know that ___ ÷ ___ = ___

10 ÷ 2 = 5

10 x 5 = 50

100 ÷ 5 = 20 ✓

100 x 5 = 500
Izzy partitions 100 into 10 equal parts. All parts have an equal value. What is the value of each part?

'10' ✓
What is the missing number in the sequence?

50

60 ✓

70

80
Estimate the value of a) on this number line.

60 ✓

70

80
Estimate the value of b) on this number line.

'25' ✓

Exit quiz

Izzy partitions 1,000 into 10 equal parts. All parts have an equal value. What is the value of each part?

'100' ✓
Sofia partitions 1,000 into five equal parts. All parts have an equal value. What is the value of each part?

'200' ✓
Look at the bar graph. How many hits were there on the school website on Tuesday?

'1,400' ✓
Look at the bar graph. The sum of the number of hits on Monday and Friday was ______

'1,000' ✓
Which is the best estimate of 750 g shown on this scale?

A ✓

B

C
Estimate the mass shown on the scale by A.

1,500 g

1,600 g ✓

1,900 g

2,000 g

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Lesson Details

Key learning points

There are ten 100s in 1,000
There are five 200s in 1,000
Knowing how many 100s and 200s 1,000 is composed of helps to interpret scales and measures.
Knowing the composition of 1,000 can help to work out the meaning of each division on scales and number lines.
We can use our knowledge of divisions on a scale to estimate.

Common misconception

Pupils unable to connect scale divisions with knowledge of composition of 1,000

Spend time developing confidence in counting in multiples of 100 and 200 to 1,000 before making explicit links between this and scales and measures. Use 'The whole is 1,000 and we have divided it into ___ parts of ___' when doing this.

Keywords

Compose - The parts that make up the whole.
Counting in multiples - When we count by a number other than 1
Divisions - Equal divisions can be found on a number line or scale for equal values.
Estimation - We find a value that is close enough to the right answer, usually with some thought or calculation involved.