Jawaban:

A. Tentukan Kpk dengan kelipatan persekutuan

9 dan 12

9 = 9, 18, 27, 36, 45, 54, 63, 72, 81, 90

12 = 12, 24, 36, 48, 60, 72, 84, 96, 108, 120

Kelipatan persekutuan dari 19 dan 12 = 36, 72......

Kpk dari 19 dan 12 = 36

10 dan 15

10 = 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

15 = 15, 30, 45, 60, 75, 90, 105, 120, 135, 150

Kelipatan persekutuan dari 10 dan 15 = 30, 60, 90...

Kpk dari 10 dan 15 = 30

15 dan 30

15 = 15, 30, 45, 60, 75, 90, 105, 120, 135, 150

30 = 30, 60, 90, 120, 150, 180, 210, 240, 270, 300

Kelipatan persekutuan dari 15 dan 30 = 30,60,90,120,150...

Kpk dari 15 dan 30 = 30

18 dan 24

18 = 18, 36, 54, 72, 90, 108, 126, 144, 162, 180

24 = 24, 48, 72, 96, 120, 144, 168, 192, 216, 240

Kelipatan persekutuan dari 18 dan 24 =72,144,...

kpk dari 18 dan 24 = 72

20 dan 30

20 = 20,40,60,80,100,120,140,160,180,200

30 = 30,60,90,120,150,180,210,240,270,300

Kelipatan persekutuan dari 20 dan 30 =60,120,180...

Kpk dari 20 dan 30 = 60

B. Tentukan Kpk dengan faktorisasi prima

9 dan 12

9 = 3 × 3 = 3²

12 = 2 × 2 × 3 = 2²

Kpk = 2×2 × 3 × 3 = 36

15 dan 18

15 = 3 × 5

18 = 2× 3×3 = 2×3²

Kpk = 3×3×2×5 = 90

27 dan 36

27 = 3×3×3 = 3³

36 = 2×2×3×3 = 2² × 3²

Kpk = 2×2×3×3×3= 108

40 dan 56

40 = 2×2×2×5 = 2³×5

56 = 2×2×2×7 = 2³ × 7

kpk = 2×2×2×5×7 = 280

64 dan 96

64 = 2×2×2×2×2×2=2⁶

96 = 2×2×2×2×2×3 = 2⁵×3

kpk =2×2×2×2×2×2×3 = 192

semoga membantu