The given subtraction is:
[tex]5.48\times10^{-3}-0.000777[/tex]
The first step is to rewrite the number 0.000777 into scientific notation, taking into account we need both numbers to have the same power of 10:
[tex]0.000777=0.777\times10^{-3}[/tex]
As we moved the decimal point 3 places right, the exponent goes down by 3.
Now both have the same power of 10, subtract the coefficients:
[tex]5.48-0.7=4.703[/tex]
And rewrite in scientific notation:
[tex]4.703\times10^{-3}[/tex]
