Multiplication Of Whole Numbers, Decimals, Squares And Square Roots Worksheet With Answers Page 33
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41Lesson focus
Homework activity
Introduce the millimetre, the centimetre and
Pupils are to complete questions 1–4 on page 35
the metre. Discuss which unit would be most
and 36 of the WB.
suitable for measuring a) the length of one’s little
finger, b) the length of the corridor, c) the width
Lesson 2
Pupil’s Book pages 133;
of a textbook and d) the length of a matchstick.
Workbook page 34
Explain how to measure using a standard unit of
measurement, for example a centimetre. Show your
Preparation
pupils the importance of starting at 0 on the ruler,
You will need to have:
tape measure or metre stick.
•
String or wool to be used as non-standard units
It is important that pupils know how to estimate
of length.
length. Give them the opportunity to estimate the
lengths of different objects in the classroom before
Starter activity
completing Exercise 1.
Let different pupils measure different objects in the
Make sure that pupils do not confuse the
classroom, for example the desk and the length of the
measurements in centimetres with those in metres.
classroom using non-standard units of measurement.
Question 2 is important to give pupils a real sense
Provide your pupils with a piece of string or wool as a
of how long 1 m is. Make sure that your pupils
non-standard unit of length. Discuss the necessity of
understand that the photograph of a metre stick is
having standardised units of length.
not to scale.
Lesson focus
Answers
Read through the examples on page 133. Ensure
Exercise 1
pupils understand the steps in the calculations.
Pupils estimate and measure various lengths.
Note also that the measurements are in kilometres.
Workbook
We use kilometres to measure long distances.
1. Estimate: pupils’ own estimates
Assist pupils to complete question 1 of Exercise 2
Measurements: 3 cm, 7 cm, 4 cm, 6 cm, 5 cm
and then let them do question 2 on their own.
2. a), c), e), d), b)
3. Check pupil’s lengths are accurate.
Answers
4. b), e), a), c), d)
Exercise 2
1. Pupils’ own answers
Assessment
2. a) 6 km; b) 7 km; c) 11 km; d) 9 km
Pupils should be able to choose the appropriate
unit of length for measuring an object.
Assessment
Ensure they can estimate the length of lines
and then accurately measure these lengths in
Pupils should be able to measure lengths using
centimetres.
metres.
Observe and listen to the pupils whilst working
They need to know how to work with
through the example and during the lesson.
distances in kilometres.
Look at their answers to Exercise 1.
Observe and listen to the pupils during the
lesson. Look at their answers to Exercise 2.
Support activity
Pupils who struggle with this activity should
be given more practice with estimating and
measuring lengths of everyday objects.
88
Unit 21: Estimating and measuring length
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