Multiplication Of Whole Numbers, Decimals, Squares And Square Roots Worksheet With Answers Page 9
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41Squares and square roots
Unit 15
Objectives
By the end of this unit, each pupil should be able to:
•
Find the square of 1- and 2-digit numbers
•
Solve quantitative reasoning problems of
•
Identify objects with perfect faces
squares and square roots of perfect squares.
•
Find the square root of perfect squares up
to 400
Suggested resources
5. Find the square root of perfect squares using
the factor method.
Wall chart of 20 × 20 squares; Everyday objects
6. Solve quantitative aptitude problems involving
that have perfect faces.
squares and square root numbers.
Key word definitions
Lesson 1
Pupil’s Book pages 95 and 96;
index form: a number written as a base and its
Workbook page 27
power i.e. 2
2
power: the power shows how many times the given
Preparation
number must be multiplied
You will need to have:
square root: the number that when multiplied by
•
Flashcards for the Starter activity.
itself gives the square of that number
Starter activity
Frequently asked questions
Show the wall chart of 20 × 20 squares. Ask the
Q What prior knowledge do the pupils need?
pupils to look at how the multiplications are done
A Pupils should be able to find factors of numbers.
once again. 1 × 8 = 8, 3 × 7 = 21, 5 × 8 = 40, etc.
Common errors that pupils make
Hold up flash cards of 1- and 2-digit numbers up
Pupils sometimes find it difficult to remember their
to 12. Ask a pupil to pick another flash card from
times tables without looking at their multiplication
a bag where they are kept. Ask the pupil for the
table. This problem can be remedied by drilling the
product of the two numbers.
pupils very well on the multiplication table.
Lesson focus
Evaluation guide
Ask pupils to look at the main diagonal of the
Pupils to:
wall chart and write down the numbers that are
1. Find the square of given numbers using a 20 by
multiplied with their answers. These are 1 × 1 = 1,
20 square chart.
2 × 2 = 4, 3 × 3 = 9, 4 × 4 = 16, etc. up to 20 × 20.
2. Give examples of objects with perfect square
Lead the pupils to understand that the square of 1
faces in their homes and school.
is 1 × 1 = 1, the square of 2 is 2 × 2 = 4, the square
3. Solve quantitative aptitude problems involving
of 3 is 3 × 3 = 9 etc. up to 20 × 20. Ask them to
finding of squares.
find the square of 9, the square of 16, and so on.
4. Find square roots of given numbers using a 20
Work through the examples with the pupils and ask
by 20 square chart.
them to answer Exercise 1.
64
Unit 15: Squares and square roots
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