Question

Tính bằng cách thuận tiện nhất 17/25 x 13/19 + 17/25 x 6/19

Answer 1

\(\frac{17}{25}\times\frac{13}{19}+\frac{17}{25}\times\frac{6}{19}\)

\(=\frac{17}{25}\times\left(\frac{13}{19}+\frac{6}{19}\right)\)

\(=\frac{17}{25}\times\frac{19}{19}\)

\(=\frac{17}{25}\times1\)

\(=\frac{17}{25}\)

_HT_

Answer 2

\(\dfrac{17}{25}\left(\dfrac{13}{19}+\dfrac{6}{19}\right)\)

\(=\dfrac{17}{25}.1=\dfrac{17}{25}\)

Answer 3

bấm lộn nha

Answer 4

17/15x(13/19+6/19)

17/15x19/19

17/15x1

vẫn bằng 17/15

Answer 5

{17}{21}