FORM 1 UNIT 1-WHOLE NUMBERS
Form 1 Unit 1: Lesson 1- Place Value Of Whole Numbers
4 Quizzes
UNIT 1 Lesson 1: Revision Exercise 1
UNIT 1 Lesson 1: Revision Exercise 2
Unit 1 Lesson 1:Exercise 3
Unit 1 Lesson 1: Revision Exercise 4
Form 1 Unit 1: Lesson 2 - The 4 Operations & Whole Numbers
3 Quizzes
Unit 1 Lesson 2: Exercise 1
Unit 1 Lesson 2: Exercise 2
Unit 1 Lesson 2: Exercise 3
Form 1 Unit 1:Lesson 3 - Mathematical Vocabulary & Whole Numbers
4 Quizzes
Unit 1 Lesson 3: Exercise 1
Unit 1 Lesson 3: Exercise 2
Unit 1 Lesson 3: Exercise 3
Unit 1 Lesson 3: Exercise 4
Form 1 Unit 1: Lesson 4 - Order Of Operations
2 Quizzes
Unit 1 Lesson 4: Exercise 1
Unit 1 Lesson 4: Exercise 2
Form 1 Unit 1: Lesson 5 - Number Puzzle
2 Quizzes
Unit 1 Lesson 5: Exercise 2
Unit 1 Lesson 5: Exercise 3
Form 1 Unit 1: Lesson 6 - Introduction To Problem Solving
3 Quizzes
Unit 1 Lesson 6: Exercise 1
Unit 1 Lesson 6: Exercise 2
Unit 1 Lesson 6: Exercise 3
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Form 1 Unit 1: Lesson 2 – The 4 Operations & Whole Numbers
FORM 1 UNIT 1-WHOLE NUMBERS
Form 1 Unit 1: Lesson 2 – The 4 Operations & Whole Numbers
Objective
At the end of the lesson the student should be able to:
Add and subtract whole numbers.
Multiple and divide whole numbers.
Understand and apply the relationship between addition and multiplication.
Understand and apply the relationship between subtraction and division.
Addition and Subtraction
To add and subtract effectively and easily, it is advisable to write the numbers under their place values.
When adding and subtracting, remember that:
adding or subtracting
zero
leaves any number unchanged
e.g. 7+
0
=7, 8 –
0
=8
Changing the
order
does
not
change the result for
addition e.g.
6
+
8
=
8
+
6
=
14
However, when you change the order of a subtraction, the
result changes
6
–
3
≠
3
–
6
When adding more than two numbers we can group them in any order:
(
2
+3
)
+8=
(
2+8
)
+3=
(
3+8
)
+2, etc.
Example 1
Work out the value of a) 4 + 8 +7 b) 7963-498
Solution
:
4+8+7 =19
Always arrange numbers in their place values before adding or subtracting.
Multiplication of Whole Numbers
Multiplication is the process of repeated addition.
6 + 6 +6 = 6 × 3 =18
The commutative law is true for all multiplication.
6 × 7=7 × 6
A
×
B
=
B
×
A
Example
Simplify 40 × 86
Solution
40 × 86 = 3440
Dividing Whole Numbers.
Division is the process of finding out how many times one number can be subtracted from another. It is the opposite of multiplication.
Example 1
How many 4’s are in 24?
Solution
4’s in 24 = 24-4-4-4-4-4-4 = 0
24 divided by 4 equals 6
24 ÷ 4=6
Note
a remainder occurs if the divisor is not a factor of the dividend.
The commutative law of does not hold true for division
4 ÷ 5≠5 ÷ 4
A ÷ B ≠B ÷ A
Division of any number by zero is not possible
Lesson Content
Unit 1 Lesson 2: Exercise 1
Unit 1 Lesson 2: Exercise 2
Unit 1 Lesson 2: Exercise 3
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