Multiplication Of Whole Numbers, Decimals, Squares And Square Roots Worksheet With Answers Page 37

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Questions 9 and 10 involve multiplying a 2-digit
Extension activity
number by a one-digit number. You may wish to
Ask pupils to work in pairs to make up a
do an example of this on the board first.
Challenge similar to the one on page 138 in the
1. 16 + 5; 2. 30 + 50 + 20; 3. 100 – 45;
PB.
4. 40 – 5 – 10; 5. 4 × 8; 6. 7 × 7; 7. 40 ÷ 8;
8. 56 ÷ 7; 9. 72 × 4; 10. 35 × 6
Homework activity
Pupils are to complete questions 1–4 on page 37
Lesson focus
of the WB.
Work through the worked examples with your pupils
so that they understand how to do the calculations.
In Exercise 1, your pupils add and subtract lengths
Lesson 2
Pupil’s Book pages 138 and 139;
with the same units. Point out that we can only add
Workbook page 38
and subtract lengths that have the same unit.
Preparation
Pupils must make sure that they do the calculations
correctly. When adding or subtracting, it is
You will need to have:
important that they align the numbers correctly in
Prepared some problems for the Starter activity.
the place value columns.
Starter activity
Before your pupils do question 4, it is important
Write down three lengths on the board, for example
to discuss strategies of how to approach such
2 m, 5 m and 8 m. Your pupils should work in
examples. Remind your pupils to write the unit of
pairs. Each pupil should individually devise a word
length with every answer.
problem that involves all three measurements, and
Answers
write their word problem down. They then swap
their problem with their partner and solve one
Exercise 1
another’s word problems.
1. a) 48 cm; b) 74 cm; c) 95 cm; d) 98 cm
Repeat this activity, but this time using a mixture
2. a) 54 m; b) 44 m; c) 40 m; d) 382 m
of units, for example 60 cm, 1 m and 5 cm.
3. a) 125.59 m; b) 10.204 km; c) 246.16 m;
d) 19.387 km
Lesson focus
4. a) 18 m; b) 44 cm; c) 51 m; d) 59 m
This lesson focuses on problems with mixed units
Challenge
and word problems involving lengths and distances.
Check the answers together with the pupils.
Read through the problems in Exercise 2 with your
pupils. Pause after each one and invite your pupils
Workbook
to ask any questions that they might have. Try to
1. a) 1 043 m; b) 531 m; c) 282 cm
avoid spelling out to them what operations to use.
2. a) 65 cm; b) 187 m; c) 133 cm
3. a) 300 cm; b) 700 cm; c) 1 400 cm; d) 250 cm
Answers
4. a) 1 m; b) 4 m; c) 6 m; d) 21.2 m
Exercise 2
1. a) 96 km 751 m; b) 1 047 km 281 m;
Assessment
c) 149 km 849 m; d) 5 km 703 m;
Pupils should be able to add and subtract
e) 18 km 696 m; f ) 239 km 920 m
lengths and write their answers with the
2. a) 14.63 + 18.5 + 34.47 = 67.6 cm
relevant unit of measurement.
b) 134.5 – 97.9 = 36.6 m longer
c) 10.86 + 12.258 = 23.118 km
Observe and listen to pupils’ responses during
d) 52.705 – 31.950 = 20.755 km
the lesson. Look at their answers to Exercise 1.
92
Unit 22: Adding and subtracting length

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