Jawaban:

1. 8 1/2 - 3 1/6

= 17/2 - 19/6

= 51/6 - 19/6

= 32/6

= 5 2/6 atau 5 1/3 (kalau disederhanakan)

2. 3/4 : 2/8 × 7/9

= 3/4 × 8/2 (dibalik)

= 24/8 × 7/9

= 168/72

= 2 24/72

= 2 1/3

3. 3,8 × 25,9

= 38/10 × 259/10

= 9842/100

= 98,42

4. 3/8 - 75/1000 (kerjakan di dalam kurung dulu)

= 375/1000 - 75/1000

= 300/1000 = 3/10

Jadi, 2/5 × 4/10 : 3/10

= 8/50 × 10/3

= 80/150

= 8/15

5. 2 2/3 + 1 1/4 = 8/2 + 5/4 = 16/4 + 5/4 = 21/4

Jadi, 21/4 × 1/2 - 1 1/3

= 21/8 - 4/3

= 63/24 - 32/24

= 31/24 = 1 7/24

Semoga benar ya, maaf kalau ada kesalahan:)