Question

calculati 1/8+1/8*4; 1/6+1/6:1/3; 4/9+3/10:6/10; 1 1/3*2 1/2+6; 2 1/7*1 1/5-1/21:1/3; 5/6:(1/3+1/2:1/3). VA ROG; DAU COROANA !!

Answer 1

1/8+4/8=5/8
1/6+1/6×3=1/6+3/6=4/6=2/3
4/9+3/10×10/6=4/9+1/2 amplificãm pe 4/9 cu 2 si pe 1/2 cu 9= 8/18+9/18=17/18
4/3×5/2+6=10/3+6 amplificãm pe 6 cu 3=10/3+18/3=28/3
15/7×6/5-1/21×3=18/7-3/21=18/7-1/7=17/7
5/6:(1/3+1/2×3)=5/6:(1/3+3/2)amplificãm pe 1/3 cu 2 si pe 3/2 cu 3= 5/6:(2/6+9/6)=5/6:11/6=5/6×6/11=5/11

Answer 2

1 ) 1 / 8 + 1 / 8 x 4 = 

= 1 / 8 + 4 / 8

= 5 / 8



2 ) 1 / 6 + 1 / 6 : 1 / 3 = 

= 1 / 6 + 1 / 6 x 3 / 1

= 1 / 6 + 1 / 2

= 1 / 6 + 3 / 6

= 4 / 6 

= 2 / 3



3 ) 4 / 9 + 3 / 10 : 6 / 10 = 

= 4 / 9 + 3 / 10 x 10 / 6 

= 4 / 9 + 1 / 2

= 8 / 18 + 9 / 18

= 17 / 18



4 ) 1 1 / 3 x 2 1 / 2 + 6 = 

= 4 / 3 x 5 / 2 + 6 

= 10 / 3 + 6

= 10 / 3 + 6 

= 10 / 3 + 18 / 3 = 28 / 3



5 )  2 1 / 7 x 1 1 / 5 - 1 / 21 : 1 / 3 = 

= 15 / 7 x 6 / 5 - 1 / 21 x 3 / 1

= 18 / 7 - 1 / 7 

= 17 / 7 




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

= 5 / 6 : ( 1 / 3  + 1 / 2 x 3 / 1 ) 

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

= 5 / 6 : 11 / 6

= 5 / 6 x 6 / 11

= 5 / 11