Question

45x16-17

________________

45x15+28

Answer 1

\(\frac{45\times16-17}{45\times15+28}\)

\(=\frac{45\times15+45-17}{45\times15+28}\)

\(=\frac{45\times15+28}{45\times15+28}\)

\(=1\)

Answer 2

\(\frac{45x16-17}{45x15+28}\)

=\(\frac{45x\left(15+1\right)-17}{45x15+28}\)

=\(\frac{45x15+45x1-17}{45x15+28}\)

=\(\frac{45x15+28}{45x15+28}\)

= 1 ( vì TS=MS )

Answer 3

tích minh đi mình trả lời