tolong teman taman .......

1. (10 × 20) - 89
= 200 - 89
= 111

2. (125 - 20) : 7
= 105 : 7
= 15

3. ((11 × 20) : 4) + 25
= (220 : 4) + 25
= 55 + 25
= 80

4. ((14 × 20) + 80) : 30
= (280 + 80) : 30
= 360 : 30
= 12

Jika q = 20 maka,
1. 10q - 89
=(10 X 20) - 89
= 200-89
= 111
2. (125 - q) : 7
= (125-20) : 7
= 105 : 7
= 15
3. (11q : 4) + 25
= ((11 X 20) : 4) + 25
= (220:4) + 25
= 55 + 25
= 80
4. (14q + 80) : 30
= ((14 X 20) + 80) : 30
= (280 + 80) : 30
= 360 : 30
= 12