Question

2 trừ 3/4 nhân 8/5 cộng 1/2 tính

Answer 1

\(2-\dfrac{3}{4}x\dfrac{8}{5}+\dfrac{1}{2}\)

\(=2-\dfrac{24}{20}+\dfrac{1}{2}\)

\(=2-\dfrac{24+10}{20}\)

\(=\dfrac{2}{1}-\dfrac{34}{20}=\dfrac{40-34}{20}=\dfrac{6}{20}=\dfrac{3}{10}\)

Answer 2

\(2-\dfrac{3}{4}\times\dfrac{8}{5}+\dfrac{1}{2}=\dfrac{2\times20}{1\times20}-\dfrac{24}{20}+\dfrac{1\times10}{2\times10}\\ =\dfrac{40-24+10}{20}=\dfrac{26}{20}=\dfrac{13}{10}\)