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
?????