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PRIMARY 4 MATHEMATICS SECOND-TERM E NOTES
SUBJECT: MATHEMATICS
CLASS: BASIC FOUR
WEEK ONE
MULTIPLICATION OF NUMBERS BY 2-DIGIT NUMBERS
Example 1 multiply 25 by 12
Method 1: column form method 2: Expanded form
2 5 25 x 12 = 25 x (10 = 2)
x 1 2 = (25 x 10) = (25 x 2)
2 5 0 (25 x 10) = 250 + 50
+ 5 0 (25 x 2) = 300
3 0 0
5 4 Step 1: Multiply the units
× 2 6
Regroup
3 2 4 = 54 × 6 Step 2: Multiply the tens
+ 1 0 8 0 = 54 × 20 Regroup
1 4 0 4 = 54 × 26
EXERCIES 1: Multiply the following
EXERCISE 2: multiply the following
Example
25 × 34 = (20 × 34) + (5 × 34)
= 680 + 170
= 850
Exercise 3
Copy and fill the boxes with the correct numerals.
WEEK TWO
BEHAVIOURAL OBJECTIVES: At the end of the lesson, pupils should be able to
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