Unit 2 Section 1 : Place Value

Example 1

Here are some number cards:

You can use each card once to make the number 1735, like this:

(a)	What is the biggest number you can make with the four cards?

(b)	Explain why you cannot make an even number with the four cards.

Note:	It is often helpful to refer to a number line when comparing values;
	a number line can also show negative values:

Remember that the symbol < means 'less than' and > means 'greater than'.

Put the correct sign, < or = or >, into each sentence.

The arrow on this thermometer shows a temperature of 10 °C.

(a)

Draw an arrow on the thermometer to show
a temperature of 24 °C.
Label the arrow 24 °C.

(b)

Draw an arrow on the thermometer to show
a temperature of – 4 °C.
Label the arrow – 4 °C.

(c)

The temperature was – 10 °C.
It went up 15 °C.
What is the temperature now?

(d)

Write these temperatures in order, coldest first.

3 °C,

– 10 °C,

0 °C,

20 °C,

– 1 °C

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(a)	Write the numbers:
	(i)	one hundred and eighty,
	(ii)	two hundred and twelve,
	(iii)	one hundred and eight,
	(iv)	ninety two
(b)	Using the numbers in (a), write them in order with the smallest first.
	, , ,

(a)	What is at about +10 m ?
(b)	What is at about –10 m ?
(c)	What is about 30 m higher than the chest?

(a)	Seventy two pounds, forty five pence.
(b)	One hundred and three pounds, fifty pence.
(c)	One hundred and thirty pounds, five pence.