Worksheet generator

Pick what you want, print the page. The answer key comes with it, on its own sheet, and it tells you the mistake behind every wrong choice — not just which letter is right.

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3 on the sheet, 3 match these filtersReshuffle Start overseed 1

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Math Kangaroo practice

Name: ______________________Date: ____________3 questions · 9 points

1.A rope is 3.5 metres long. A second rope is 240 centimetres long. How much longer is the first rope, in centimetres?[3]
- A1.1
- B11
- C110
- D236.5
- E590
2.A bag of flour holds 2.5 kg. 1750 g are used. How many grams are left?[3]
- A0.75
- B75
- C750
- D1250
- E1747.5
3.Three more than twice a number is 19. What is the number?[3]
- A8
- B11
- C16
- D22
- E41

Kangaroo Atlas · https://kangaroo-atlas.vercel.app · seed 1 · CC BY-NC-SA 4.0 · Independent project, not affiliated with Math Kangaroo in USA, NFP.

Answer key — Math Kangaroo practice

Each wrong choice carries the thinking that produces it. When a student picks C, this is what they were doing.

1.C — 110KA-0029Unit conversion
- AI subtracted correctly in metres but then gave the answer in metres when centimetres were asked for.
- BI converted 3.5 metres to 35 centimetres instead of 350.
- DI subtracted without converting at all, taking 3.5 away from 240.
- EI added the two lengths instead of finding the difference between them.
2.C — 750KA-0113Unit conversion
- AI worked in kilograms and gave the answer in kilograms when grams were asked for.
- BI converted 2.5 kg to 250 g rather than 2500 g.
- DI subtracted 1750 from 3000, mis-converting 2.5 kg as three thousand grams.
- EI subtracted without converting at all, taking 2.5 away from 1750.
3.A — 8KA-0144Translating a sentence into an equation
- BI subtracted 8 from 19 rather than working the two steps backwards.
- CI subtracted the 3 from 19 and gave that without halving it.
- DI added the 3 to 19 instead of subtracting it.
- EI doubled 19 and added 3, applying the machine forwards instead of undoing it.

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