To solve this “Measuring Mass Practice” worksheet, we need to read the
triple beam balance correctly.
A triple beam balance has
three beams, each with a sliding weight (rider):
1.
Top beam: Measures in
100-gram increments (labeled 0–500g).
2.
Middle beam: Measures in
10-gram increments (labeled 0–100g).
3.
Bottom beam: Measures in
1-gram increments (often with 0.1g precision — labeled 0–10g).
✔ Rule: Add the values from all three beams to get the total mass in grams.
---
Let’s go one by one:
---
1.
- Top beam: pointer at
300 g
- Middle beam: pointer at
40 g
- Bottom beam: pointer at
2.0 g (exactly on the 2)
→
Total = 300 + 40 + 2 = 342 g
✔ Answer: 342 g
---
2.
- Top beam:
500 g
- Middle beam:
50 g
- Bottom beam:
7.0 g
→
Total = 500 + 50 + 7 = 557 g
✔ Answer: 557 g
---
3.
- Top beam:
200 g
- Middle beam:
80 g
- Bottom beam:
5.0 g
→
Total = 200 + 80 + 5 = 285 g
✔ Answer: 285 g
---
4.
- Top beam:
200 g
- Middle beam:
10 g
- Bottom beam:
1.5 g (halfway between 1 and 2 → 1.5)
→
Total = 200 + 10 + 1.5 = 211.5 g
✔ Answer: 211.5 g
---
5.
- Top beam:
0 g (pointer at far left — not on 100 or above)
- Middle beam:
30 g
- Bottom beam:
3.0 g
→
Total = 0 + 30 + 3 = 33 g
✔ Answer: 33 g
---
6.
- Top beam:
0 g
- Middle beam:
0 g (pointer at far left)
- Bottom beam:
6.0 g
→
Total = 0 + 0 + 6 = 6 g
✔ Answer: 6 g
---
7.
This is the same as problem #2? Wait — let’s look at the image for question 7:
It shows:
- Top beam:
300 g
- Middle beam:
50 g
- Bottom beam:
6.0 g
→
Total = 300 + 50 + 6 = 356 g
✔ Answer: 356 g
*(Note: This appears to be a separate diagram below questions 1–6, so it's not a repeat.)*
---
8.
Same diagram as #7? Yes — it says “Read the triple beam balance below” again — same image.
So mass =
356 g
Now convert to
milligrams (mg).
Remember:
>
1 gram = 1000 milligrams
So:
356 g × 1000 = 356,000 mg
✔ Answer: 356,000 mg
---
##
✔ Final Answers:
1.
342 g
2.
557 g
3.
285 g
4.
211.5 g
5.
33 g
6.
6 g
7.
356 g
8.
356,000 mg
---
📌
Tip for students: Always check that the riders are sitting exactly on the lines — if they’re between lines, estimate to the nearest 0.1g. In this worksheet, most are on exact marks, except #4 which is halfway (so 1.5g).
Parent Tip: Review the logic above to help your child master the concept of using a balance measuring mass worksheet.
