1. Created by Mr. Lafferty Maths Dept.
Length
Measuring Length
24-Feb-19
Created by Mr. Lafferty Maths Dept.

2. Created by Mr. Lafferty Maths Dept.
Starter Questions
Q1. Solve the equation 3a = 27
Q2. Find two numbers that multiply to give 18
and subtract to give 3.
Q3. Solve the equation x – 30 = 55
Q4. True or false x = 27
24-Feb-19
Created by Mr. Lafferty Maths Dept.

3. Created by Mr. Lafferty Maths Dept.
Units of Length
The 4 units of length are :
The metre : This is the standard unit of length and is
approximately the distance from your nose
to the end of your outstretched arm.
100th
The centimetre :
This is of a metre and is about
the width of your pinky nail.
The Millimetre :
This is of a centimetre and is
about the width of a sewing needle.
1000
The Kilometre :
This is metres and is about the
length of 10 football pitches.
24-Feb-19
Created by Mr. Lafferty Maths Dept.

4. Created by Mr. Lafferty Maths Dept.
Measuring Length
Learning Intention
Success Criteria
1 We are learning how to measure length.
Be able identify units on a ruler.
2. Be able to measure accurately length of an object.
24-Feb-19
Created by Mr. Lafferty Maths Dept.

5. Converting cm to mm and vice versa
centimetres
(cm)
millimetres
(mm)
24-Feb-19
Created by Mr. Lafferty Maths Dept.

6. Start at 0 NOT the edge of the ruler
Measuring a Line
13cm
8.5cm
(8cm 5mm)
(85mm)

7. Measuring a Line
6.2cm
(6cm 2mm)
(62mm)
2.6cm
(2cm 6mm)
(26mm)

8. Measuring a Line
3.9 cm
9.1 cm

9. Drawing Lines
Draw a line 4.2 cm
Draw a line 9.4 cm

10. Created by Mr. Lafferty Maths Dept.
Measuring Length
Now try N3
Ex 7.3 & Ex7.4
Ch7 (page 81)
24-Feb-19
Created by Mr. Lafferty Maths Dept.

11. Units of Length Converting Measurements
Examples
Convert 2m to cm :
2 x 100 = 200 cm
Convert 4km to m :
4 x 1000 = 4000 m
Convert 34cm to mm :
34 x 10 = 340 mm
Convert 50cm to m :
50 ÷ 100 = 0.5 m
24-Feb-19
Created by Mr. Lafferty Maths Dept.

12. Units of Length Converting Measurements
Now try TJ2a
Ex 2
Ch13 (page 116)
24-Feb-19
Created by Mr. Lafferty Maths Dept.