To determine if two ratios are equivalent, we can simplify each ratio to its lowest terms and check if they are the same. Alternatively, we can cross-multiply: if the products are equal, the ratios are equivalent.
Let's solve each pair:
1. 5:10 and 3:6
- 5:10 = 5/10 = 1/2
- 3:6 = 3/6 = 1/2
- 1/2 = 1/2
- Answer: yes
2. 10:20 and 50:150
- 10:20 = 10/20 = 1/2
- 50:150 = 50/150 = 1/3
- 1/2 ≠ 1/3
- Answer: no
3. 6:42 and 10:60
- 6:42 = 6/42 = 1/7
- 10:60 = 10/60 = 1/6
- 1/7 ≠ 1/6
- Answer: no
4. 100:200 and 30:60
- 100:200 = 100/200 = 1/2
- 30:60 = 30/60 = 1/2
- 1/2 = 1/2
- Answer: yes
5. 15:30 and 100:300
- 15:30 = 15/30 = 1/2
- 100:300 = 100/300 = 1/3
- 1/2 ≠ 1/3
- Answer: no
6. 5:15 and 40:120
- 5:15 = 5/15 = 1/3
- 40:120 = 40/120 = 1/3
- 1/3 = 1/3
- Answer: yes
7. 8:24 and 3:12
- 8:24 = 8/24 = 1/3
- 3:12 = 3/12 = 1/4
- 1/3 ≠ 1/4
- Answer: no
8. 30:60 and 45:90
- 30:60 = 30/60 = 1/2
- 45:90 = 45/90 = 1/2
- 1/2 = 1/2
- Answer: yes
9. 12:48 and 8:32
- 12:48 = 12/48 = 1/4
- 8:32 = 8/32 = 1/4
- 1/4 = 1/4
- Answer: yes
10. 40:80 and 125:200
- 40:80 = 40/80 = 1/2
- 125:200 = 125/200 = 5/8
- 1/2 ≠ 5/8
- Answer: no
11. 3:2 and 24:18
- 3:2 = 3/2 = 1.5
- 24:18 = 24/18 = 4/3 ≈ 1.333
- 3/2 ≠ 4/3
- Answer: no
12. 5:4 and 20:16
- 5:4 = 5/4 = 1.25
- 20:16 = 20/16 = 5/4 = 1.25
- 5/4 = 5/4
- Answer: yes
13. 11:22 and 44:88
- 11:22 = 11/22 = 1/2
- 44:88 = 44/88 = 1/2
- 1/2 = 1/2
- Answer: yes
14. 13:26 and 15:45
- 13:26 = 13/26 = 1/2
- 15:45 = 15/45 = 1/3
- 1/2 ≠ 1/3
- Answer: no
Final Answers:
1. yes
2. no
3. no
4. yes
5. no
6. yes
7. no
8. yes
9. yes
10. no
11. no
12. yes
13. yes
14. no
Parent Tip: Review the logic above to help your child master the concept of ratio worksheet grade 8.