Question

Evaluate, Express your answer in scientific notation 5.48 x 10^-3 -0.000777

Answer 1

The given subtraction is:

`5.48*10^(-3)-0.000777`

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:

`0.000777=0.777*10^(-3)`

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:

`5.48-0.7=4.703`

And rewrite in scientific notation:

`4.703*10^(-3)`