Question

2/6 + 4/30 - 7/15

2/5+ 5/6 -4/30

4/21 + 3/7 - 1/3

16/5 + 5/2 - 11/6

2/4 + 3/5 -3/10

1/4 + 1/2 - 5/12

25/7 + 23/8 - 5/14

por favor ayúdenme

Answer 1

1)) 2/6 + 4/30 - 7/15 = (2•5)/(6•5)+ 4/30- (7•2)/(15•2)= 10/30+ 4/30- 14/30= 14/30- 14/30=0.

2)) 2/5+ 5/6 -4/30= (2•6)/(5•6)+ (5•5)/(6•5) -4/30= 12/30+ 25/30- 4/30= 37/30- 4/30= 33/30= 1 3/30= 1 (3:3)/(30:3)= 1 1/10= 1,1

3)) 4/21 + 3/7 - 1/3 = 4/21+ (3•3)/(7•3)- (1•7)/(3•7)= 4/21+ 9/21- 7/21= 13/21- 7/21= 6/21= (6:3)/(21:3)= 2/7

4)) 16/5 + 5/2 - 11/6 = (16•6)/(5•6)+ (5•15)/(2•15)- (11•5)/(6•5)= 96/30+ 75/30- 55/30= 171/30- 55/30= 116/30= 3 26/30= 3 (26:2)/(30:2)= 3 13/15.

5)) 2/4 + 3/5 -3/10 = (2:2)/(4:2)+ 3/5 - 3/10= 1/2+ 3/5- 3/10= (1•5)/(2•5)+ (3•2)/(5•2)- 3/10= 4/10+ 6/10 - 3/10= 7/10= 0,7

6)) 1/4 + 1/2 - 5/12= (1•3)/(4•3)+ (1•6)/(2•6) - 5/12= 3/12+ 6/12- 5/12= 4/12= (4:4)/(12:4)= 1/3

7)) 25/7 + 23/8 - 5/14 = 25/7 - 5/14+ 23/8= (25•2)/(7•2)- 5/14+ 23/8= 50/14- 5/14+ 23/8= 45/14+ 23/8= 3 3/14+ 2 7/8= 3 (3•4)/(14•4) + 2 (7•7)/(8•7)= 3 12/56+ 2 49/56= 5 61/56= 6 5/56