Question

Determine o valor do número racional r descrito abaixo

olha a foto

Answer 1

1/2 + 1/3
----------- =
1/4 - 1/5

3+2/6
---------
5-4/20

5/6
------ = 5/6 × 20/1 = 100/6 = 50/3 ✓
1/20

legenda:
1/2*(3/3) + 1/3*(2/2)=
3/6 + 2/6
(3+2)/6
5/6

1/4*(5/5) - 1/5*(4/4)
5/20 - 4/20
(5-4)/20
1/20