Let's solve each of the three triple beam balance readings step by step. A
triple beam balance has three beams, each with a sliding weight (rider) that measures mass in different increments:
-
Top beam: 0–100 grams (in 10g increments)
-
Middle beam: 0–500 grams (in 100g increments)
-
Bottom beam: 0–10 grams (with smaller divisions, usually 0.1g)
We add the values from all three beams to get the total mass.
---
1. First Set
Top beam (100g scale):
- The rider is at
80g
Middle beam (500g scale):
- The rider is at
200g
Bottom beam (10g scale):
- The rider is at
4.5g (between 4 and 5, halfway → 4.5)
✔ Total mass = 80 + 200 + 4.5 =
284.5 grams
>
✔ Answer: 284.5 g
---
2. Second Set
Top beam:
- Rider is at
30g
Middle beam:
- Rider is at
150g (between 100 and 200, but closer to 150? Wait — let's check carefully.)
Wait! Actually:
- The middle beam goes from 0 to 500 in 100g increments.
- The rider is
at 100g, not 150.
Wait — look closely:
The rider on the
middle beam is aligned with
100g, not between.
So it’s
100g.
Bottom beam:
- Rider is at
3.4g (just past 3, near the 4th small mark — each small mark is 0.1g, so 3.4g)
✔ Total mass = 30 + 100 + 3.4 =
133.4 grams
>
✔ Answer: 133.4 g
---
3. Third Set
Top beam:
- Rider is at
60g
Middle beam:
- Rider is at
500g
Bottom beam:
- Rider is at
7.6g (just before 8, at the 6th small mark after 7 → 7.6g)
✔ Total mass = 60 + 500 + 7.6 =
567.6 grams
>
✔ Answer: 567.6 g
---
✔ Final Answers:
1. The mass is
284.5 g
2. The mass is
133.4 g
3. The mass is
567.6 g
All values are in
grams (g), which is the SI unit for mass.
Let me know if you'd like a visual explanation or how to read the scales more precisely!
Parent Tip: Review the logic above to help your child master the concept of reading a triple beam balance worksheet.
