Multiplication Of Whole Numbers, Decimals, Squares And Square Roots Worksheet With Answers Page 11
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41Lesson focus
Starter activity
Explain to the pupils that if 144 is the square of
Drill the pupils on square roots of numbers.
12, i.e. 12 × 12 = 144, then 12 is the square root of
Pick ten square numbers and let the pupils say
144. This is the number that you multiply by itself
the square root of the number as fast as possible.
to have the result. Ask them what is the square root
They may make calculations, but encourage them
of 4? What is the square root of 169? And so on.
to do the working out in their heads.
Work through the text and example on page 97 in
Lesson focus
the PB and ask them to answer Exercise 3.
Revise the meaning of a factor and then work
through the examples on page 98 of the PB. Make
Answers
sure that each pupil understands the process and
Exercise 3
can explain it to a partner.
___
_____
___
_____
36 = √
6 × 6 = 6; b) √
16 = √
4 × 4 = 4;
1. a) √
____
_______
Give pupils a selection of square numbers and ask
c)
100 =
10 × 10 = 10;
√
√
____
them to find the square roots using the factor method.
_______
d) √
144 =
12 × 12 = 12;
√
____
_______
Ask them to complete Exercise 4 using the factor
121 =
11 × 11 = 11
e)
√
√
method.
Workbook
2. a) square root; b) square; c) square;
Answers
d) square root; e) square; f ) square
3. a) 6; b) 12; c) 9; d) 13; e) 4; f ) 15
Exercise 4
1. a) 8; b) 12; c) 18; d) 17; e) 13
2. a) 66; b) 20; c) 45; d) 152; e) 30
Assessment
Workbook
Pupils should be able to find the squares of
4. 5
numbers and solve problems involving squares
5. a) 7; b) –9; c) opposite signs; d) –13; e) 13
of numbers.
Observe pupils responses during the lesson.
Look at their answers to Exercise 3.
Assessment
Pupils should be able to find the squares of
Extension activity
numbers and solve problems involving squares
Ask pupils to find the squares and square roots
of numbers.
of selected numbers between 20 and 40.
Observe pupils responses during the lesson.
Look at their answers to Exercise 3.
Homework activity
Pupils are to complete questions 2 and 3 of
Support activity
page 27 of the WB.
For pupils that are having difficulty, use the
number chart to show them how they can find
Lesson 4
Pupil’s Book pages 98-99;
the square root of a number. Find the number
Workbook page 27
on the number chart and then draw a line up to
the top of the chart and to the left of the chart.
Preparation
You will need to have:
Homework activity
•
A number chart to refer to.
Pupils are to complete questions 4 and 5 of
page 27 of the WB.
66
Unit 15: Squares and square roots
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