Question

a) 4 / 8 + 5 / 4 =

b) 12 /18 + 15 / 20 = 

các bạn nói luôn cụ thể nhé 

mình sẽ tích cho

Answer 1

\(a.\dfrac{4}{8}+\dfrac{5}{4}=\dfrac{4+10}{8}=\dfrac{14}{8}=\dfrac{7}{4}.\\ b.\dfrac{12}{18}+\dfrac{15}{20}=\dfrac{2}{3}+\dfrac{3}{4}=\dfrac{8+9}{12}=\dfrac{17}{12}.\)

Answer 2

a)4/8+5/4=16/32+40/32=56/32=7/4

b)12/18+15/20=120/180+135/180=255/135=17/9