Multiplication Of Whole Numbers, Decimals, Squares And Square Roots Worksheet With Answers Page 23
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41Answers
Lesson focus
Allow pupils to interpret some given mathematical
Exercise 1
statements. Lead them to write open sentences
1. a) 28 + 38 = 66; b) 64 – 37 = 27;
in the form of mathematical statements and then
c) 382 – 141 = 241; d) 8 + 22 = 30;
solve the equation formed.
e) 494 – 373 = 121; f ) 9.25 + 10.4 = 19.65
Discuss the examples with the pupils and make
sure they understand both methods for finding an
Puzzle
unknown in division and multiplication problems.
The digit is 7.
Ask them to complete Exercise 2.
Workbook
Answers
1. a) 25; b) 5; c) –27; d) 32; e) 30; f ) 9.56; g) 56;
h) 2.15; i) 12; j) 18; k) 56
Exercise 2
1. a) 9 × 5 = 45; b) 4 ÷ 7 = 12; c) 6 × 7 = 42;
Assessment
d) 102 ÷ 3 = 34; e) 27 × 5 = 135;
f ) 34 × 6 = 204; g) 44 ÷ 4 = 11; h) 56 ÷ 4 = 14;
Pupils should be able to find the unknown or
i) 13 × 9 = 117
missing number in an open sentence. Observe
how the pupils find missing or unknown
Workbook
numbers during the lesson. Look at their
1. l) 4
answers to Exercise 1.
2. a) □ × 4 = 76 □ = 19; b) 7.48 + □ = 12 □ = 4.52;
c) □ × 5 = 155 □ = 31; d) 4 × □ = 98 □ = 24.5
Support activity
Work through some of the number sentences on
Assessment
the board with pupils who are struggling, and
stick the missing numbers over the shapes to
Pupils should be able to find the unknown or
show how to work out the missing numbers.
missing number in an open sentence.
Observe how the pupils find missing or
Homework activity
unknown numbers during the lesson. Look
Pupils are to complete question 1 a)–k) on
at their answers to Exercise 2.
page 31 of the WB.
Extension activity
Lesson 2
Give pupils some number sentences with two
Pupil’s Book pages 115 and 116;
terms, for example:
Workbook page 31
2 × □ + 5 = 11
Preparation
You will need to have:
Homework activity
•
Flashcards showing open sentences
Pupils are to complete question 1. l) and
•
Balancing scales showing balancing equations.
question 2 on page 31 of the WB.
Starter activity
Lesson 3
Pupil’s Book pages 116 and 117
Revise how to find the unknown in an open
sentence. Lead them to write mathematical
Preparation
statements for some given information.
You will need to have:
•
The answers to the Quantitative reasoning
exercise to hand.
78
Unit 18: Open sentences
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