N13: use standard units of mass, length, time, money and other measures (including standard compound measures) using decimal quantities where appropriate

Standard unit of mass

Grams (g)

Standard unit of length

Metres (m)

Standard unit of time

Seconds (s) or minutes (m) or hours (h) depending on the situation

Standard unit of money

Pounds (£) or pennies (p) depending on the situation

What are compound measures?

Measures which involve two or more different units

Standard unit of density

Grams/centimetres³ (g/cm³)

Standard unit of speed

Metres per second (m/s)

Standard unit of pressure

Newtons per metres² (N/m²)

Standard unit of unit pricing

Pounds per gram (£/g)

The metric system

• length in metres (m)

• mass in kilograms (kg)

• volume in cubic metres (m³)

The imperial system

• length in inches, feet and yards

• mass in pounds (lb), ounces (oz) and stones

• volume in gallons

Converting metric units of length

• 1 km = 1,000 m

• 1 m = 100 cm

• 1 cm = 10 mm

• 1 m = 1,000 mm

Converting between centimetres and metres

1mx1m=1m², 100cmx100cm=10000cm²

1mx1mx1m=1m³, 100cmx100cmx100cm=1000000cm³

Converting between centimetres and millimetres

1cmx1cm=1cm², 10mmx10mm=100mm²

1cmx1cmx1cm=1cm², 10mmx10mmx10mm=1000mm²

What is 50000mm³ in cm³?

1cm³=1000mm² (10×10×10=1000)

50000/1000=50

50cm³