Question

Tính bằng cách thuận tiện: 14/19 - 5/7 + 5/19 + 47/7 = ?

lm hẳn lười giải ra cho mik.

Cảm ơn mn!

Answer 1

\(\dfrac{14}{19}+\dfrac{5}{19}-\dfrac{5}{7}+\dfrac{47}{7}=\dfrac{19}{19}+\dfrac{42}{7}=1+6=7\)

Answer 2

19/19 + 42/7 = 1 + 6 =7

Answer 3

 

7

Answer 4

=(5/7 + 47/7)- (14/19 + 5/19 ) 

= 42/7 - 19/19

= 6-1

=5

Answer 5

14/19+5/19−5/7+47/7=19/19+42/7=1+6=7     nha

Answer 6

= 7