Question

Create three fractions by replacing the word ‘blank’ in each fraction with a variable or number. You can use the same value or three different replacement values. Explain all the work in simplifying your new addition problem.

3 blank blank
-----+ ---- - -----
blank a^2 a^3

Answer 1

\[\frac{3}{a^{3}} + \frac{2}{a^{2}} - \frac{4}{a^{3}} = \frac{3}{a^{3}} + \frac{2a}{a^{3}} - \frac{4}{a^{3}} = \frac{3 + 2a - 4}{a^{3}} = \frac{2a - 1}{a^{3}}\]
I used the values a^3, 2, and 4.

Answer 2

can you explain what you did please ? i don't understand this at all

Answer 3

The look of any fraction can be changed by multiplying it by a value of 1, e.g:
\[1 = \frac{2}{2} = \frac{2500}{2500}\]

Multiply each fraction by 1 in one form or another so that they have the same denominator. Then you add them together and simplify as needed.