Year 3 mathematics exercise | PDF - Free Printable

Let’s go through each question one by one and solve them carefully.

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17.
The badminton racket is long (it has a long handle and head).
The table tennis bat is short (smaller, compact shape).
→ So: long, short → Option A

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18.
We need to make a 2-metre line using pencils that are 5 cm each.
First, convert 2 metres to centimetres:
2 m = 200 cm
Now divide: 200 ÷ 5 = 40
→ So we need 40 pencils → Option C

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19.
Add: 9 + 91 = 100 cm? Wait — the problem says “9 / 91 5cm” — this looks like it might be a typo or misformatting. But looking at options, maybe it’s meant to be adding lengths: 9 cm + 91 cm + 5 cm? That would be 105 cm — not in options.
Wait — perhaps it’s “9 × 91 × 5”? No, that’s too big.
Looking again: Maybe it’s “9 + 91 + 5” = 105 — still not matching.
But option B is 108 — close.
Wait — maybe it’s “9 + 91 + 5” but with units? Or perhaps it’s 9 dm + 91 cm + 5 mm? Let’s try converting all to cm:
9 dm = 90 cm
91 cm = 91 cm
5 mm = 0.5 cm
Total = 90 + 91 + 0.5 = 181.5 — no.
Alternatively, maybe it’s just 9 + 91 + 5 = 105 — not listed.
Wait — perhaps it’s “9 × 12” or something else?
Actually, looking at the original image text: “9 / 91 5cm” — maybe it’s “9 + 91 + 5” = 105 — but 105 isn’t an option.
Option B is 108 — maybe it’s 9 + 99? Not sure.
Wait — perhaps it’s “9 + 91 + 5” but written as “9/91 5cm” meaning 9, 91, and 5 — sum is 105 — not there.
Maybe it’s multiplication? 9 × 12 = 108 — oh! Maybe “9 / 91 5cm” is a misprint for “9 × 12”? But 12 isn’t there.
Alternatively, maybe it’s 9 + 99? Still not.
Wait — let’s look at the answer choices: A.18 B.108 C.118 D.180
Perhaps it’s 9 + 99 = 108? But where does 99 come from?
Another idea: Maybe “9 / 91 5cm” means 9 cm + 91 cm + 5 cm = 105 cm — closest is 108? Not really.
Wait — perhaps it’s 9 × 12 = 108 — and “91 5cm” is a typo for “12 cm”? Unlikely.
Alternatively, maybe it’s 9 + 91 + 8? No.
I think there might be a formatting error in the question. But since 108 is an option and 9×12=108, and 12 is common, maybe that’s intended.
But let’s skip and come back — or assume it’s 9 + 99? Not helpful.
Wait — another thought: In some contexts, “9 / 91 5cm” could mean 9 feet 91 inches? No, that doesn’t make sense.
Perhaps it’s 9 cm + 91 cm + 5 cm = 105 cm — and 105 is not there, so maybe it’s 108 as closest? But that’s guessing.
Looking at other questions, perhaps I should move on and return.
Actually, let’s calculate 9 + 91 + 5 = 105 — not in options.
Option B is 108 — difference of 3. Maybe it’s 9 + 91 + 8? No.
Perhaps it’s 9 × 12 = 108 — and “91 5cm” is a miswrite for “12 cm”. I’ll go with B.108 as most plausible if forced.
But let’s note: This question may have a typo. For now, I’ll tentatively choose B.108

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20.
307 kg + 178 kg = ?
307 + 178:
300 + 170 = 470
7 + 8 = 15
Total = 470 + 15 = 485 kg → Option B

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21.
Mass of a watermelon — typically around 5 kg.
A.150 — too heavy (like a person)
B.50 — still too heavy (big dog)
C.25 — possible for very large, but average is less
D.5 — yes, typical watermelon is 4-6 kg → D.5

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22.
42 kg X 8 = ?
40 × 8 = 320
2 × 8 = 16
Total = 320 + 16 = 336 → Option C

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23.
Convert 7 ℓ to ml.
1 ℓ = 1000 ml
So 7 ℓ = 7 × 1000 = 7000 ml → Option A

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24.
180 ml + 275 ml = ?
180 + 275:
180 + 200 = 380
380 + 75 = 455 ml → Option A

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25.
718 ℓ - 209 ℓ = ?
718 - 209:
718 - 200 = 518
518 - 9 = 509 ℓ → Option A

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26.
Diagram is a pentagon (5 sides). Number of angles = number of sides = 5 → Option D

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27.
Which shape does NOT have symmetry line?
A. Square — has multiple lines of symmetry
B. Arrow — if it’s symmetric left-right, yes; but if it’s pointing right, might not be symmetric vertically? Wait, standard arrow shape often has vertical symmetry.
C. Trapezoid — if it’s isosceles, it has symmetry; if not, no. The diagram shows a non-isosceles trapezoid? Looking at typical problems, C is often the one without symmetry.
D. Hexagon — regular hexagon has symmetry.
Assuming C is a scalene trapezoid or irregular, it may not have symmetry.
In many such tests, the trapezoid shown is not symmetric. So C

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28.
Which is NOT a polygon?
Polygon must have straight sides and be closed.
A. Triangle — yes
B. Rectangle — yes
C. Circle — no, curved side → C
D. Parallelogram — yes

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29.
Which is a prism?
Prism has two identical bases and rectangular sides.
A. Cylinder — not a prism (curved surface)
B. Rectangular box — yes, rectangular prism → B
C. Cone — no
D. Pyramid — no

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Now, going back to Q19 — after re-examining, perhaps “9 / 91 5cm” is meant to be “9 cm + 91 cm + 5 cm” = 105 cm — but 105 not in options.
Option B is 108 — maybe it’s 9 + 99? Or 12×9=108.
Perhaps it’s “9 × 12” and “91 5cm” is a misprint. Since 108 is there, and others don’t fit, I’ll stick with B.108

But let’s double-check: 9 + 91 + 5 = 105 — not listed.
Another possibility: Maybe it’s 9 dm + 91 cm + 5 mm?
9 dm = 90 cm
91 cm = 91 cm
5 mm = 0.5 cm
Sum = 181.5 — not in options.
Or 9 m + 91 cm + 5 mm? Too big.
Perhaps it’s multiplication: 9 × 12 = 108 — and “91 5cm” is irrelevant? Unlikely.
I think there’s a typo, but since 108 is the only reasonable choice near 105, I’ll go with B.

Final Answers:

17. A
18. C
19. B
20. B
21. D
22. C
23. A
24. A
25. A
26. D
27. C
28. C
29. B

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Final Answer:
17. A
18. C
19. B
20. B
21. D
22. C
23. A
24. A
25. A
26. D
27. C
28. C
29. B