Question

1.4.1 Expanding brackets
Now, observe how use of brackets allows us to follow our procedur
systematically. Do you think that it will be easy to keep a track of what steps mi
have to follow without using brackets?
(i) 7 * 109 7 * (100 + 9) = 7 * 100 + 7 x 9 = 700 + 63 = 763
(ii) 102 x 103 = (100+ 2) * (100 + 3) = (100 + 2) * 100+ (100 + 2) * 3
100 x 100 + 2 * 100 + 100 x 3 + 2 * 3
= 10,000 + 200 + 300 + 6 = 10,000 + 500 + 6
= 10,506
(iii) 17 x 109 = (10 + 7) * 109 = 10 x 109 + 7 * 109
= 10 X (100+ 9) + 7 * (100 + 9)
10 100 + 10 x 9 + 7 x 100 + 7 x 9
1000 + 90 + 700 + 63 = 1,790 +63
1.853​

Answer 1

Step-by-step explanation:

जो आता है उसको पीछे कर दीजिएगा जो है आगे कर देख तेरा आजा राधा रानी आजा ना कान्हा मेरा वह फोन करके बता दूंगा