Question

[Nguyễn Hùng Dũng]

tính 

23 phần 9 + 67 phần 9

24 phần 15 + 36 phần 15

9 phần 6 + 5

7 + 20 phần 9

26 phần 18 + 7 phần 9

5 phần 7 + 16 phần 14

8 phần 20 + 6 phần 5

9 phần 7 + 11 phần 35

3 phần 36 + 8 phần 6

25 phần 9 + 2

Answer 1

[Nguyễn Quang Tâm]

\(\dfrac{23}{9}+\dfrac{67}{9}=\dfrac{23+67}{9}=\dfrac{90}{9}=10\)

\(\dfrac{24}{15}+\dfrac{36}{15}=\dfrac{24+36}{15}+\dfrac{60}{15}=4\)

\(\dfrac{9}{6}+5=\dfrac{9}{6}+\dfrac{30}{6}=\dfrac{9+30}{6}=\dfrac{39}{6}=\dfrac{13}{2}\)

\(7+\dfrac{20}{9}=\dfrac{63}{9}+\dfrac{20}{9}=\dfrac{63+20}{9}=\dfrac{83}{9}\)

\(\dfrac{26}{18}+\dfrac{7}{9}=\dfrac{26}{18}+\dfrac{14}{18}=\dfrac{26+14}{18}=\dfrac{40}{18}=\dfrac{20}{9}\)

\(\dfrac{5}{7}+\dfrac{16}{14}=\dfrac{10}{14}+\dfrac{16}{14}=\dfrac{10+16}{14}=\dfrac{26}{14}=\dfrac{13}{7}\)

\(\dfrac{8}{20}+\dfrac{6}{5}=\dfrac{8}{20}+\dfrac{24}{20}=\dfrac{8+24}{20}=\dfrac{32}{20}=\dfrac{8}{5}\)

\(\dfrac{9}{7}+\dfrac{11}{35}=\dfrac{45}{35}+\dfrac{11}{35}=\dfrac{45+11}{35}=\dfrac{56}{35}=\dfrac{8}{5}\)

\(\dfrac{3}{36}+\dfrac{8}{6}=\dfrac{3}{36}+\dfrac{48}{36}=\dfrac{3+48}{36}=\dfrac{51}{36}=\dfrac{17}{12}\)

\(\dfrac{25}{9}+2=\dfrac{25}{9}+\dfrac{19}{9}=\dfrac{25+19}{9}=\dfrac{44}{9}\)