Question

bài 2;tính

a).2/3+5/4        b).15/25+6/21       c).35/11-2     d).68/17-3

ai nhanh và làm đủ mình tick

Answer 1

2/3+5/4=8/12+15/12=23/12

15/25+6/21=31/35

35/11-2=13/11

68/17-3=1

Answer 2

a) \(\frac{2}{3}+\frac{5}{4}=\frac{8}{12}+\frac{15}{12}\)

                   \(=\frac{8+15}{12}=\frac{23}{12}\)

b) \(\frac{15}{25}+\frac{6}{21}=\frac{3}{5}+\frac{2}{7}\)

                          \(=\frac{21}{35}+\frac{10}{35}=\frac{31}{35}\)

c) \(\frac{35}{11}-2=\frac{35}{11}-\frac{22}{11}\)

                      \(=\frac{13}{11}\)

d) \(\frac{68}{17}-3=\frac{68}{17}-\frac{51}{17}\)

                    \(=1\)

Answer 3

2/3+5/4=23/12

15/25+6/21=31/35

35/11-2=13/11

68/17-3=1

Answer 4

a) : 23/12

b) : 9/7

c) : 13/11

d) : 1

k cho mình nhé

Answer 5

a) \(\frac{2}{3}+\frac{5}{4}=\frac{8}{12}+\frac{15}{12}=\frac{23}{12}=1\frac{11}{12}\)

b) \(\frac{15}{25}+\frac{6}{21}=\frac{3}{5}+\frac{2}{7}=\frac{21}{35}+\frac{10}{35}=\frac{31}{35}\)

c)\(\frac{35}{11}-2=\frac{35}{11}-\frac{22}{11}=\frac{13}{11}=1\frac{2}{11}\)

d) \(\frac{68}{17}-3=4-3=1\)