Question

Answer 1

T

Answer 2

Tính 4 câu giúp mình nhé

 

Answer 3

\(\dfrac{4}{5}-\dfrac{3}{5}+\dfrac{1}{4}=\dfrac{1}{5}+\dfrac{1}{4}=\dfrac{4}{20}+\dfrac{5}{20}=\dfrac{9}{20}\)

Answer 4

5/12+3/4+1/3=5/12+9/12+4/12=18/12=3/2

1/4+3/7-11/14=7/28+12/28-11/28=8/28=2/7

4/5-3/5+1/4=1/5+1/4=9/20

5/9+2/3-2=5/9+6/9-18/9=-7/9

Answer 5

\(\dfrac{5}{9}+\dfrac{2}{3}-2=\dfrac{5}{9}+\dfrac{6}{9}-2=\dfrac{11}{9}-2=-\dfrac{7}{9}\)

Answer 6

\(\dfrac{5}{12}+\dfrac{3}{4}+\dfrac{1}{3}=\dfrac{5}{12}+\dfrac{9}{12}+\dfrac{4}{12}=\dfrac{18}{12}=\dfrac{3}{2}\)

Answer 7

\(\dfrac{1}{4}+\dfrac{3}{7}-\dfrac{11}{14}=\dfrac{7}{28}+\dfrac{12}{28}-\dfrac{22}{28}=-\dfrac{3}{28}\)