Y4 Measurement

Chapter 15: Measurement

October 5

​Measurement: Length

Reading a ruler

10mm is the same as 1cm

​

• 2cm = ?

• 3cm = ?

• 40mm =​ ?

​

​Measurement: Length

​mm = millimetres

​cm = centimetres

​m = metres

How to measure?

• Line up what you want to measure at zero

• ​Read the big numbers first, then the smaller lines

How to measure?

• Line up what you want to measure at zero

• ​Read the big numbers first, then the smaller lines

Multiple Choice

How long is the paper clip?

• 2.5cm

• 2.5mm

• 12cm

• 20cm

What is the length in millimetres?

A paper clip is 2 cm 5 mm long.​

​

​

​2cm = 20mm

​2 cm 5mm = 20mm +5mm

​

​= 25mm

​

​The paper clip is 25mm long

Multiple Choice

Length in cm and mm

• 32mm

• 0cm 3mm

• 3cm 2mm

• 30cm

​Measurement in mm

A paper clip is 2 cm 5 mm long.​What is the length in millimetres?

​

​

​2cm = 20mm

​2 cm 5mm = 20mm +5mm

​

​= 25mm

​The paper clip is 25mm long

Practice: Textbook (page 133)​

​Qs 3, 6

Multiple Choice

10 cm = ____ mm

• 10 mm

• 1000 mm

• 100 mm

• 1 mm

Multiple Choice

45 mm = __ cm __ mm

• 45 cm 0 mm

• 40 cm 5 mm

• 4 cm 5 mm

• 4 cm 50 mm

Multiple Choice

90 mm = __cm __mm

• 9 cm 0 mm

• 9 cm 10 mm

• 0 cm 9 mm

• 90 cm 0 mm

Multiple Choice

7 cm 3 mm = ___mm

• 703 mm

• 7.3 mm

• 73 mm

• 730 mm

​Summary Answers to Textbook p.133

Converting measurements​

Masses, Volume, Length​

Converting ​Measurements

Length

Mass

Volume

​Converting Measurements

​1 kg = 1000 g

​1 km = 1000 m

​1 l = 1000 ml

​

​kilo = for large units

​milli = small units

​

Multiple Select

What measurement would you use to measure a grape?

• millimetre (mm)

• centimetre (cm)

• kilometre (km)

• metre (m)

Multiple Select

What unit of measurement do we use to measure the length of this corridor?

• millimetre (mm)

• centimetre (cm)

• metre (m)

• kilometre (km)

Multiple Choice

What unit of measurement do we use to measure the length of this road?

• millimetre (mm)

• centimetre (cm)

• metre (m)

• kilometre (km)

Practice: Textbook pg. 134​

(In quiz form)

Multiple Choice

 Express the following measurements in the given units:

7 kg = ____ g

• 70 g

• 700 g

• 7000 g

• 7 g

Multiple Choice

 Express the following measurements in the given units:

9 km = ____ m

• 900 m

• 0.900 m

• 0.9 m

• 9000 m

Multiple Choice

 Express the following measurements in the given units:

35 l = ____ ml

• 35 000 ml

• 3500 ml

• 3.500 ml

• 3500 ml

Multiple Choice

 Express the following measurements in the given units:

4000 ml = ____ l

• 4 l

• 4000 l

• 0.400 l

• 40 l

Multiple Choice

 Express the following measurements in the given units:

6000 g = ____ kg

• 6 kg

• 0.600 kg

• 6000 kg

• 0.006 kg

Multiple Choice

 Express the following measurements in the given units:

20 000 ml = ____ l

• 2 l

• 20 l

• 0.20 l

• 200 l

Multiple Choice

 Express the following measurements in the given units:

47 000 m = ____ km

• 0.4700 km

• 4.7 km

• 47 km

• 470 km

​Summary Answers to Textbook p.134

Multiple Choice

What unit of measurement do we use to measure how heavy a durian is?

• kilogram (kg)

• gram (g)

• centimetre (cm)

• litre (l)

Multiple Choice

What unit of measurement do we use to measure how heavy a grape is?

• kilogram (kg)

• gram (g)

• centimetre (cm)

• litre (l)

Multiple Choice

What might be the volume of this bottle of sanitizer?

• 50 millilitres (ml)

• 100 litres (l)

• 0.5 kilogram (kg)

• 1 centimetre (cm)

Multiple Choice

What might be the volume of this bottle of water?

• 1.5 litre

• 100 millilitre

• 2 kilogram

• 0.5 metre

Multiple Choice

What might be the volume of this beverage?

• 100 kilogram

• 5 litres

• 20 millilitres

• 10 metre

​Conversion of measurements (continued)

​The mass of a rock is 3 kg 450 g.

​

​In grams, the mass of this rock is...

​

​

​

​

= ​3450 g​

​​

​

​Conversion of measurements (continued)

A tank contains 18 l 128 ml of water.

​

​In millilitres, the amount of water in the tank is ...​

​​

​

​

​

​The amount of water in the tank is 18 128 ml

​

​Conversion of measurements (continued)

​​Tim made 8025 ml of fruit punch for a party.

​

​In litres and millilitres, that will be...​

​

​

​

​Tim made 8 l 25 ml of fruit punch.

​

​

Practice: Textbook pg. 135​

​(In quiz form)

Fill in the Blanks

49 800 m = _ km

m

Fill in the Blanks

2 kg 500 g = _

g

Fill in the Blanks

9 l 231 ml = _

ml

Fill in the Blanks

6 045 m = _ km

m

Fill in the Blanks

8 307 ml = _ l

ml

Fill in the Blanks

12 km 790 m = _

m

Fill in the Blanks

24 135 g = _ kg

g

​Summary Answers to Textbook p.135

This week's homework

​Wednesday: Workbook pg. 110

​Thursday: Workbook pg. 111

​

​Due date: Saturday morning.

​

On Saturday afternoon, solutions and answers will be given in Edmodo.

• ​Cross-check and mark your answers first, before turning them in through Edmodo.