Question

tính nhanh : 17(5/17-1/34+1/2 )

Answer 1

\(17.\left(\dfrac{5}{17}-\dfrac{1}{34}+\dfrac{1}{2}\right)=17.\left(\dfrac{10}{34}-\dfrac{1}{34}+\dfrac{17}{34}\right)=17.\dfrac{26}{34}=13\)

\(#PaooNqoccc\)

Answer 2

\(17.\left(\dfrac{5}{17}-\dfrac{1}{34}+\dfrac{1}{2}\right)\)

\(=17.\left(\dfrac{10}{34}-\dfrac{1}{35}+\dfrac{1}{2}\right)\)

\(=17.\left(\dfrac{9}{34}+\dfrac{1}{2}\right)\)

\(=17.\left(\dfrac{9}{34}+\dfrac{17}{34}\right)\)

\(=17.\dfrac{13}{17}\)

\(=13\)

Answer 3

\(17.\left(\dfrac{5}{17}-\dfrac{1}{34}+\dfrac{1}{2}\right)\\ =\dfrac{17.5}{17}-\dfrac{17}{34}+\dfrac{17}{2}\\ =5-\dfrac{1}{2}+\dfrac{17}{2}\\ =\dfrac{9}{2}+\dfrac{17}{2}\\ =\dfrac{26}{2}=13\)

Answer 4