Jika =2/3, =3/4,=5/6, maka hitunglah nilai dari: a. pq + pr c. pq : r b. pr − qr d. qr : p

Dik: p = 2/3
       q = 3/4
        r = 5/6
Jwb:
a. [tex] \frac{2}{3} × \frac{3}{4} [/tex] + [tex] \frac{2}{3} × \frac{5}{6} [/tex] = 1[tex] \frac{1}{18} [/tex]
b. [tex] \frac{2}{3} × \frac{5}{6} - \frac{3}{4} × \frac{5}{6} [/tex] = -[tex] \frac{5}{72} [/tex]
c. 2/3×3/4 : 5/6 = 3/5
d. 3/4×5/6 : 2/3 = 15/16

p = 2/3 q = 3/4 r = 5/6

a. pq + pr = (2/3 x 3/4) + (2/3 x 5/6)
= 6/12 + 10/18
= 18/36 + 20/36
= 38/36
= 19/18
= 1 1/18

b.pr - qr = (2/3 x5/6) - (3/4 x 5/6)
= 10/18 - 15/24
= 40/72 - 45/72
= -5/72

c. pq : r = 2/3 x 3/4 : 5/6
= 2/3 x 3/4 x6/5
= 36/60
= 3/5

d. qr : p = 3/4 x 5/6 : 2/3
= 3/4 x 5/6 x 3/2
= 45/48
= 15/16