 # Length www mathsrevision com N 3 Measuring Length

• Slides: 12 Length www. mathsrevision. com N 3 Measuring Length 10 -Sep-20 Created by Mr. Lafferty Maths Dept. Starter Questions www. mathsrevision. com N 3 Q 1. Solve the equation Q 2. Find two numbers that multiply to give 18 and subtract to give 3. Q 3. Solve the equation Q 4. True or false 10 -Sep-20 4 x 3 a = 27 x – 30 = 55 5 + 7 = 27 Created by Mr. Lafferty Maths Dept. Units of Length The 4 units of length are : www. mathsrevision. com N 3 The metre : This is the standard unit of length and is approximately the distance from your nose th 100 to the end of your outstretched arm. The centimetre : This is of a metre and is about the width of your pinky nail. The Millimetre : 1000 This is of a centimetre and is about the width of a sewing needle. The Kilometre : 10 -Sep-20 This is metres and is about the length of 10 football pitches. Created by Mr. Lafferty Maths Dept. Measuring Length www. mathsrevision. com N 3 Learning Intention 1 Success Criteria We are learning how to measure length. 1. Be able identify units on a ruler. 2. Be able to measure accurately length of an object. 10 -Sep-20 Created by Mr. Lafferty Maths Dept. Converting cm to mm and vice versa www. mathsrevision. com N 3 centimetres (cm) millimetres (mm) 10 -Sep-20 Created by Mr. Lafferty Maths Dept. Measuring a Line Start at 0 NOT the edge of the ruler 13 cm 8. 5 cm (8 cm 5 mm) (85 mm) Measuring a Line 6. 2 cm (6 cm 2 mm) (62 mm) 2. 6 cm (2 cm 6 mm) (26 mm) Measuring a Line 3. 9 cm 9. 1 cm Drawing Lines Draw a line 4. 2 cm Draw a line 9. 4 cm Measuring Length www. mathsrevision. com N 3 Now try N 3 Ex 7. 3 & Ex 7. 4 Ch 7 (page 81) 10 -Sep-20 Created by Mr. Lafferty Maths Dept. Units of Length Converting Measurements N 3 www. mathsrevision. com Examples Convert 2 m to cm : 2 x 100 = 200 cm Convert 4 km to m : 4 x 1000 = 4000 m Convert 34 cm to mm : 34 x 10 = 340 mm Convert 50 cm to m : 10 -Sep-20 50 ÷ 100 = 0. 5 m Created by Mr. Lafferty Maths Dept. Units of Length Converting Measurements www. mathsrevision. com N 3 Now try TJ 2 a Ex 2 Ch 13 (page 116) 10 -Sep-20 Created by Mr. Lafferty Maths Dept.