Answer:
Answer will be [tex]140\times 10^{13}[/tex]
Step-by-step explanation:
We have to perform the calculation [tex](1.42\times 10^{15}-2\times 10^{13})[/tex] without changing into decimal
[tex]1.42\times 10^{15}[/tex] can be written as [tex]142\times 10^{13}[/tex]
So [tex]1.42\times 10^{15}-2\times 10^{13}=(142\times 10^{13}-2\times 10^{13})[/tex]
Now taking [tex]10^{13}[/tex] common
[tex]10^{13}(142-23)=140\times 10^{13}[/tex]
