METHODS OF MULTIPLICATION (TWO DIGIT NUMBER)

(1). Suppose you want to multiply 25 AND 32 –

first write 25 × 32 like this –

after that write it like this – (2352)

352 = 2 × 3 = 6 (ten’s digit × hundred’s digit)

5 × 2 = 10

= 610

10 (3 × 5 + 2 × 2) = 10 (15 + 4) = 190 (one’s digit × thousand’s digit ×10)

= 610 + 190 = 800

(2).

a. For multiplication of 25 × 32, we do :-

2 5

3 2

??

4 0

(Multiplication of one’s digit)

0 1

6 5

(Multiplication of ten’s digit)

0 1

??????

8 0 0

??????

b. For multiplication of 48 × 35, we do :-

4 8

3 5

??

0 0

2 4

2 4

1 2

?????

1 6 8 0

?????