Jawaban:

a. 27/100 = 0,135

b.69/10 = 6 9/10 = 6,9

c. 11/9 = 1 2/9 = 1,2

d. 4

Penjelasan dengan langkah-langkah:

a. 9/5 × ( 120/100 - 9/8)= 9/5 × 3/4 = 27/100 = 0,135

b. 20/100 ÷ (5/2 - 1/2) + 17/5 × 2

20/100 ÷ 2 + 17/5 × 2

20/100 ÷ 2 × 34/5

20/100 × 1/2 × 34/5

10/100 × 34/5

1/10 + 34/5 = 69/10 = 6 9/10 = 6,9

c.5 ÷(1/2 + 7/4) + 25/100 - 5/4

5 ÷ 9/4 + 25/100 - 5/4

5 ÷ 4/9 + 25/100 - 5/4

20/9 + 25/100 - 5/4 = 11/9 = 1 2/9 = 1,2

d. 7/3 × (18/25 ÷ 12/25) + 5/10

7/3 × ( 18/25 × 25/12) + 5/10

7/3 × (3 × 1/2) + 5/10

7/3 × 3/2 + 5/10

7 × 1/2 + 5/10

7/2 + 5/10 =4

semoga bisa membantu