Question

1/6 +3/8=
7/20-1/10=
6/8:2
2/15+1/35
2/3:1/6
27/98x21/81
5x3/4-1x1/4
1/3+1/3
12/18+1
6-54/24
2:12

Answer 1

1. 1/6+3/8=
= 8/48+18/48 (am amplificat prima fractie cu 8 si a 2-a cu 6)=
=26/48 (acum simplifici) => 13/24

2. 7/20-1/10=
= 7/20-2/20=
= 5/20

3. 6/8:2= 6/8x1/2=
=6/16=
= 3/8

4. 2/15+1/35=  
= (prima o amplifici cu 7 si a 2-a cu 3) => 14/105+3/105 =
= 17/105

5. 2/3:1/6=
=2/3 x6/1 =
= 12/3 = 4/1

6. 27/98x 21/81=
= 567/7938 =1/14

7. 5x3/4 - 1x1/4 =
= 15/4 - 1/4 =
= 14/4=
= 7/2

8. 1/3+1/3=
= 2/3

9. 12/18+1=
= (il amplifici pe 1/1 cu 18) => 12/18+ 18/18= 30/18 =15/9 = 5/3

10. 6-54/24=
= -48/24 = -2/1

11. 2:12=
= 0.1(6)