Page 69 - Maths Skill - 3

Multiplication 67

Multiplication of 2-digit Number by 2-digit Number

Let us learn multiplication of 2- digit number by 2-digit number through examples.

Let’s Attempt

Example 1: Multiply 32 by 21.

Solution: Arrange the numbers as per their place values and follow these steps:

Step 1: Multiply 32 by 1.
32 × 1 = 32 H T O
3
2
Write 32 in the first row.
× 2 1 20 + 1
Step 2: Multiply 32 by 20. 3 2 32 × 1

32 × 20 = (32 × 2) × 10 = 64 × 10 = 640 + 6 4 0 32 × 20
Write 640 in second row. 6 7 2

Step 3: Add the two numbers in both the rows.

32 + 640 = 672

Thus, 32 × 21 = 672

Example 2: Multiply 63 by 45.

Solution: Arrange the numbers as per their place values and follow these steps:

Step 1: Multiply 63 by 5. Th H T O

63 × 5 = 63 × 5 = 315 6 3

Write 315 in the first row. × 4 5 40 + 5

3 1 5 63 × 5
Step 2: Multiply 63 by 40.
63 × 40 = 2520 + 2 5 2 0 63 × 40

Write 2520 in the second row. 2 8 3 5

Step 3: Add the two numbers in both the rows.

315 + 2520 = 2835
Thus, 63 × 45 = 2835