Cách 1 : \(\left(\frac{1}{4}-\frac{1}{7}\right)\times\frac{1}{3}\)
\(=\frac{3}{28}\times\frac{1}{3}\)
\(=\frac{1}{28}\)
Cách 2:\(\left(\frac{1}{4}-\frac{1}{7}\right)\times\frac{1}{3}\)
\(=\frac{1}{4}\times\frac{1}{3}-\frac{1}{7}\times\frac{1}{3}\)
\(=\frac{1}{12}-\frac{1}{21}\)
\(=\frac{1}{28}\)
cách 1:
( 1/4 - 1/7) x 1/3 = 1/28
cách 2:
( 1/4 - 1/7) x 1/3 = 1/4 x 1/3 - 1/7 x 1/3
= 1/12 - 1/21
= 1/18
( 1/4 - 1/7 ) x 1/3 =
cách 1 : ( 1/4 - 1/7 ) x 1/3 = 3/28 x 1/3 = 1/28
cách 2 : ( 1/4 - 1/7 ) x 1/3 = 1/4 x 1/3 - 1/7 x 1/3 = 1/12 - 1/21 = 1/28
ai thấy đúng thì tk mk nha
