Question

a) 3/5 - 2/7 - 7/6 =

b) 9/2 - 6/3 =

subtraia as frações

Answer 1

a) MMC 5, 7, 6 /2
5, 7, 3 /5
1, 7, 3 /7
1, 1, 3 /3
1, 1, 1
MMC (5,7,6) = 2.5.7.3 = 210

3.42/5.42 - 2.30/7.30 - 7.35/6.35
126/210 - 60/210 - 245/210
(126-60-245)/210
-179/210


b) MMC 2, 3 /2
1, 3 /3
1, 1
MMC (2,3) = 2.3 = 6

9.3/2.3 - 6.2/3.2
27/6 - 12/6
(27-12)/6
15/6