Question

tính nhanh:

2016*2017+2015 phần 2018*2017-2019=

ai trả lời đúng mình tick 3 cái luôn :) ^_^

Answer 1

\(\frac{2016\cdot2017+2015}{2018\cdot2017-2019}\)

= \(\frac{2016\cdot2017+2015}{\left(2016+2\right)\cdot2017-2019}\)

= \(\frac{2016\cdot2017+2015}{2016\cdot2017+2\cdot2017-2019}\)

= \(\frac{2016\cdot2017+2015}{2016\cdot2017+4034-2019}\)

= \(\frac{2016\cdot2017+2015}{2016\cdot2017-2015}\)

= \(1\)

Answer 2

\(\frac{2016\times2017+2015}{2018\times2017-2019}\)

\(=\frac{2016\times2017+2015}{\left(2016+2\right)\times2017-2019}\)

\(=\frac{2016\times2017+2015}{2016\times2017+2\times2017-2019}\)

\(=\frac{2016\times2017+2015}{2016\times2017+4034-2019}\)

\(=\frac{2016\times2017+2015}{2016\times2017+2015}\)

\(=1\)