Question

a. 3/7 + 4/9

b. 2/5 +7/2

c. 23/ 3 + 18/4

d. 13/8 - 2/ 6

e. 20/12 - 15/4

f. 16/8 - 10/9

g. 40/3 + 27/15

h. 26/ 10 + 4/2

Answer 1

Respuesta:

A

$\frac{3}{7} + \frac{4}{9} = \frac{27 + 28}{63} = \frac{55}{63}$

B

$\frac{2}{5} + \frac{7}{2} = \frac{4 + 35}{10} = \frac{39}{10}$

C

$\frac{23}{3} + \frac{18}{4} = \frac{92 + 54}{12} = \frac{146}{12} = \: \frac{73}{6}$

D

$\frac{13}{8} - \frac{2}{6} = \frac{78 - 16}{48} = \frac{62}{48} = \frac{31}{24}$

E

$\frac{20}{12} - \frac{15}{4} = \frac{80 - 180}{48} = \frac{ - 100}{48} = - \frac{25}{12}$

F

$\frac{16}{8} - \frac{10}{9} = \frac{144 - 80}{72} = \frac{64}{72} = \frac{8}{9}$

G

$\frac{40}{3} + \frac{27}{15} = \frac{600 + 81}{45} = \frac{681}{45} = \frac{227}{15}$

H

$\frac{26}{10} + \frac{4}{2} = \frac{52 + 40}{20} = \frac{92}{20} = \frac{23}{5}$

Hay algunos que se pueden simplificar y hay otros que no