Question

A=\(\frac{2019\cdot2020-4038}{2017\cdot2019+2019}\)

Answer 1

\(\frac{2019.2020-4038}{2017.2019+2019}\)

\(=\frac{2019.2020-2.2019}{2019\left(2017+1\right)}=\frac{2019\left(2020-2\right)}{2019.2018}=\frac{2019.2018}{2019.2018}=1\)

Answer 2

\(A=\frac{2019.2020-4038}{2017.2019+2019}\)

   \(=\frac{2019\left(2020-2\right)}{2019\left(2017+1\right)}\)

   \(=\frac{2019.2018}{2019.2018}=1\)

Vậy \(A=1.\)

Mà lớp 5 làm gì đã học đến dấu \(.\)(dấu nhân lớp 5 viết kiểu này cơ: x )

Chúc em học tốt.

Answer 3

\(A=\frac{2019.2020-4038}{2017.2019+2019}\)

\(A=\frac{2019.2020-2.2019}{2017.2019+2019}\)

\(A=\frac{2019.\left(2020-2\right)}{2019.\left(2017+1\right)}\)

\(A=\frac{2018}{2018}\)

\(A=1\)

Tham khảo nhé~