Measuring Mass Using Non-Standard Units - Worksheet | Maths Year 1 - Free Printable

Let's solve each question on the "Measuring Mass Using Non-Standard Units Worksheet" step by step. This worksheet uses balance scales to compare the mass of animals with non-standard units (blocks, pencils, erasers).

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1a. What is the mass of the frog?

We see:
- On one side: 3 blocks (labeled Aa, Bb, Cc)
- On the other side: a frog
- The scale is balanced.

✔ So, the frog has the same mass as 3 blocks.

Answer:
👉 3 blocks

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1b. What would the scale look like if you took 2 blocks away?

Original: 3 blocks = 1 frog
Now remove 2 blocks → only 1 block remains on the left.

So:
- Left side: 1 block
- Right side: 1 frog

Since the frog is heavier than 1 block, the frog side will go down, and the block side will go up.

Look at the two options:
- First option: Frog side down → ✔ Correct
- Second option: Balanced → ✘ Incorrect

Answer:
👉 Circle the first scale (frog side down)

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2a. What is the mass of the mouse?

We see:
- Left side: 2 pencils (red and yellow)
- Right side: a gray mouse
- Scale is balanced.

✔ So, the mouse has the same mass as 2 pencils.

Answer:
👉 2 pencils

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2b. What would the scale look like if you added 2 pencils?

Original: 2 pencils = 1 mouse
Add 2 more pencils → now 4 pencils on the left.

Left side: 4 pencils
Right side: 1 mouse

So the left side is heavier → it will go down.

Look at the two options:
- First option: Pencils side down → ✔ Correct
- Second option: Mouse side down → ✘ Incorrect

Answer:
👉 Circle the first scale (pencils side down)

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3a. What is the mass of the bird?

We see:
- Left side: 3 pencils (yellow, red, blue)
- Right side: a purple bird
- Scale is balanced.

✔ So, the bird has the same mass as 3 pencils.

Answer:
👉 3 pencils

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3b. What would the scale look like if you took 1 pencil away?

Original: 3 pencils = 1 bird
Remove 1 pencil → 2 pencils left on the left side.

Now:
- Left: 2 pencils
- Right: 1 bird

Bird is heavier → bird side goes down

Look at the options:
- First option: Bird side down → ✔ Correct
- Second option: Pencils side down → ✘ Incorrect

Answer:
👉 Circle the first scale (bird side down)

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4a. What is the mass of the snail?

We see:
- Left side: 2 erasers (blue)
- Right side: a snail
- Scale is balanced.

✔ So, the snail has the same mass as 2 erasers.

Answer:
👉 2 erasers

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4b. What would the scale look like if you added 2 erasers?

Original: 2 erasers = 1 snail
Add 2 more erasers → now 4 erasers on the left.

Left: 4 erasers
Right: 1 snail

So the left side is heavier → eraser side goes down.

Look at the options:
- First option: Erasers side down → ✔ Correct
- Second option: Snail side down → ✘ Incorrect

Answer:
👉 Circle the first scale (erasers side down)

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✔ Final Answers:

| Question | Answer |
|--------|--------|
| 1a | 3 blocks |
| 1b | Circle the scale where frog side is down |
| 2a | 2 pencils |
| 2b | Circle the scale where pencils side is down |
| 3a | 3 pencils |
| 3b | Circle the scale where bird side is down |
| 4a | 2 erasers |
| 4b | Circle the scale where erasers side is down |

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🔍 Explanation Summary:

This worksheet teaches non-standard measurement using balance scales. When the scale is balanced, both sides have equal mass. If you add or remove items, the side with more mass will go down. The key is understanding that:
- Equal mass = balanced scale
- More mass = side goes down
- Less mass = side goes up

These concepts are foundational for learning about weight and measurement in early education.