Question

1.tentukan hasil operasi hitung pengurangan pecahan berikut!
A.2 2/8-1/2=... B.5 3/4-2 2/3-1/5
2.tentukan hasil oprasi hitung perkalian pecahan berikut!
a.5/8×4/7=... b.7/6×2 2/3=...
c.1 4/5+7/9×3 1/2
3.tentukan hasil operasi hitung pembagian pecahan berikut!
a.2/3:4=.. b.7/6:3/4=.. c.5/16:1 1/4
D.3 1/2:1 3/4=...

Answer 1

1. a) 2 2/8 - 1/2
= 18/8 - 4/8
= 16/8
= 2
b) 5 3/4 - 2/3 - 1/5
= 23/4 - 2/3 - 1/5
= 345/60 - 40/60 - 12/60
= 293/60
= 4 53/60
2. a) 5/8 x 4/7
= 20/56
= 5/14
b)7/6 x 2 2/3
= 7/6 x 8/3
=56/18
= 3 2/18
=3 1/9
c) 1 4/5 + 7/9 x 3 1/2
= 9/5 + 7/9 x 7/2
= 9/5 + 49/18
= 162/90 + 245/90
= 407/90
= 4 47/90
3. a) 2/3 : 4
=2/3 : 4/1
=2/3 x 1/4
=2/12
=1/6
b) 7/6 : 3/4
= 7/6 x 4/3
=28/18
=14/9
c) 5/16 : 1 1/4
=5/16 : 5/4
=5/16 x 4/5
= 20/80
=1/4
d) 3 1/2 : 1 3/4
=7/2 : 7/4
= 7/2 x 4/7
= 28/14
= 2