Question

efetue a operação:
4.10^4 + 3.10^5 + 80.10^3

Answer 1

Primeiro resolva as potências:
4.10.000+3.100.000+80.1.000
40.000+300.000+80.000
420.000

Answer 2

4.10^4 + 3.10^5 + 80.10^3 =
=4.10^1.10^3+3.10^2.10^3+80.10^3
=10^3.(4.10^1+3.10^2+80)
=10^3.(4.10+3.100+80)
=10^3.(40+300+80)
=10^3.(420)
=420000