Question

calcule

ME AJUDEM URGENTE

Answer 1

Bom dia 

a)  m.m.c.(3,8)=24

24 : 3=8 ⇒2*8=16

24 : 8 = 3 ⇒ 1*3 = 3

$\frac{2}{3}+ \frac{1}{8}= \frac{16}{24}+ \frac{3}{24}= \frac{16+3}{24}= \frac{19}{24}$

b)m.m.c.(8,18)=72

72:8=9 ⇒5*9=45

72:18=4⇒5*4=20

$\frac{5}{8}- \frac{5}{3}= \frac{45}{72}- \frac{20}{72}= \frac{45-20}{72}= \frac{25}{72}$

c)  m.m.c.(7,3)=21

21:7=3 ⇒8*3=24

21:3=7⇒5*7=35

$\frac{8}{7}+ \frac{5}{3}= \frac{24}{21} + \frac{35}{21} = \frac{24+35}{21} = \frac{59}{21}$