Year 4 Perimeter, Area and Measures: lesson and practice

By the end of this chapter you will be able to

• Read rulers to the nearest centimetre and millimetre, and write a length in cm and mm, in mm or as a decimal of a cm
• Read weighing scales, measuring jugs and other scales, working out what each small mark is worth
• Change between km and m, m and cm, cm and mm, kg and g, and litres and millilitres, in both directions
• Use simple decimals of measures, like 2.5 m = 250 cm and 1.5 kg = 1,500 g
• Compare and order measures in different units, and choose a sensible unit or estimate
• Add and subtract measures, and solve measure word problems
• Find the perimeter of squares, rectangles and L-shapes, including shapes with missing sides
• Find the area of a shape by counting squares, and use rows and columns for rectangles

You should already know

• Place value and rounding (Chapter 1)
• Column addition and subtraction (Chapter 2)
• Times tables and multiplying and dividing by 10, 100 and 1,000 (Chapters 3 and 4)
• Halves, quarters, tenths and hundredths as decimals (Chapters 5 and 6)

Where this leads

• Time: hours, minutes and seconds (Chapter 8)
• Shapes and symmetry (Chapter 9)
• Converting units and the area of rectangles in Year 5
• Volume and area of triangles in Year 6