(2020 $\frac{2018}{2021}$ – 2019 $\frac{20182018}{20212021}$) : $\frac{2018}{2021}$ bằng:
A. $\frac{1}{2018}$ B. 1 $\frac{3}{2021}$ C. $\frac{2018}{2021}$ D. $\frac{1}{2021}$
Hoàng NguyễnPundit
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(2020 $\frac{2018}{2021}$ – 2019 $\frac{20182018}{20212021}$) : $\frac{2018}{2021}$ bằng:
A. $\frac{1}{2018}$ B. 1 $\frac{3}{2021}$ C. $\frac{2018}{2021}$ D. $\frac{1}{2021}$
(2020 và 2018/2021 – 2019 và 20182018/20212021) : 2018/2021
= (2020-2019) – (2018/2021 – 20182018/20212021 ) : 2018/2021
= 1 – 0 : 2018/2021
= 2021/2018 => 1 và 3/2021
Đáp án là : B. 1 và 3/2021 nha
~ Chúc bn hk tốt ~