Question

3/4+2/5+1/6 (suma)
2/8+1/4_2/5 (suma y resta)
4/8(1/9) (multiplicacion)
5/6(7/5)1/4 (multiplicacion)
5/6:1/5 (división)

Answer 1

SUMA:

mcm de 4-5-6 = 60

entonces: 3x15/60+2x12/60+1x10/6

=45/60+24/60+10/60

= 79/60 = 1.31

SUMA Y RESTA

2/8+1/4-2/5

mcm 8 4 5 = 40

2x5/40+1x10/40-2x8/40

= 10/40+10/40-16/40

= 4/40=0.1

MULTIPLICACION

4/8(1/9)= 4/72

5/6(7/5)1/4= 35/120

DIVISION

5/6//1/5=25/6