Question

Simplifique as expressões

5/4 - 1/2

3/8 + 1/2

7/4 - 2/5 + 1/2

Preciso da conta.

Answer 1

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

mmc (2 e 4)= 4

2) 3/8 + 1/2=
=3/8+ 4/8=
=7/8

mmc (8 e 2)=8

3) 7/4 - 2/5 +1/2=
=35/20- 8/20 + 10/20=
= 37/20

mmc (4,5 e 2)= 20