Question

tolong jawab dengan caranya dan benar...​

Answer 1

Jawaban:

1. a. 2/3 dan 12/18 (senilai)

kpk 3 dan 18 = 18

2/3 x 6/6=12/18

b. 3/8 dan 15/18 (tidak senilai)

kpk 8 dan 18 = 72

3/8 × 9/9 = 27/72

15/18 x 4/4 = 60/72

2. a. 4/8 = 6/12 = 18/36 = 20/40 = 75/150 = 200/400

b. 3/5 = 9/15 = 21/35 =27/45 = 45/75

3. a. 14/21 = 14/21 : 7/7 = 2/3

b. 36/81 = 36/81 : 9/9 = 4/9

4. a. 2/3 ... 3/5

10/15 > 6/10

b. -3/7 ... - 2/5

- 15/35 < - 14/35

c. 5/6 ... 35/42

35/42 = 35/42

5. a. 9/2 = 4 1/2

b. 11/3 = 3 2/3

c. 126/5 = 25 1/5

6.a. 3 5/7 = 26/7

b. 6 8/9 = 62/9

c. 12 1/7 = 85/7

7. a. 5/8 = 5x125/8x125 = 625/1000 = 0,625

b. 4 2/3 = 14/3 = 4,6667

c. 6/25 = 6x4/25x4 -> 24/100 = 0,24

8. a. 2/15 = 13,3%

b. 2 3/4 = 11/4 -> 11x25/4x25 = 275/100 = 275%

c. 4/6 = 66,67%

9. a. 7/25 = 7/25 x 40/40 = 280/1000 = 0,28 ‰

b. 17/20 = 17/20 x 50/50 = 850/1000 = 0,85 ‰

c. 5 3/4 = 23/4 -> 23/4 x 250/250 = 5750/1000 = 5,75 ‰

9. a. 1,232323 = 122/99

a = 1,232323...

100 x a = 123,232323

maka

100a - a = 123,232323 - 1,232323

99a = 122

a = 122/99

b. 2,351351 = 2349/999

b = 2,351351...

1000 x a = 2.351,351

maka

1000a - a = 2.351,351351 - 2,351351

999a = 2349

a = 2349/999

c. 9,88888 = 89/9

c = 9,88888...

10 x a = 98,8888

10a - a = 98,8888 - 9,8888

9a = 89

a = 89/9