Question

evaluate 102×105 without multiplying directly​

Answer 1

Answer:

102 × 105= (100+2) (100+5)

=10000 + 500 +200 +10

=10710

Answer 2

(100+2) × (100+5)

first we multiply 100 in 100+2

100×100 +100×5

= 10,000+500

= 10,500

now we multiply 2 in 100+2

2×100+2×5

200+10

210

10,500+210

10710