Mass

12 Grade 4 Mathematics questions on Mass, with worked marking schemes. 12 questions are available on this topic in full.

1. Question 1

   1 mark

   Convert 4 kg 300 g to grams.

   A. 430 g

   B. 4,030 g

   C. 43,000 g

   D. 4,300 g

   (1 mark)

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2. Question 2

   1 mark

   2 kg 600 g + 1 kg 800 g = ___

   A. 3 kg 400 g

   B. 4 kg 200 g

   C. 4 kg 500 g

   D. 4 kg 400 g

   (1 mark)

   Marking scheme

   D. $4$ kg $400$ g — the grams make $600+800=1,400$, more than a kilogram, so carry one across: $2+1+1=4$ kg with $400$ g left. A comes from dropping that carry.

3. Question 3

   1 mark

   2.5 kg = ___ g

   A. 2,500 g

   B. 250 g

   C. 2,050 g

   D. 25,000 g

   (1 mark)

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4. Question 4

   1 mark

   Convert 3,750 g to kg and g.

   A. 3 kg 75 g

   B. 3 kg 750 g

   C. 37 kg 5 g

   D. 37 kg 50 g

   (1 mark)

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5. Question 5

   1 mark

   5 kg 200 g − 2 kg 600 g = ___

   A. 2 kg 600 g

   B. 3 kg 400 g

   C. 3 kg 600 g

   D. 2 kg 400 g

   (1 mark)

   Marking scheme

   A. $2$ kg $600$ g — $200$ g cannot take away $600$ g, so borrow a kilogram to make $1,200-600=600$ g, leaving $4-2=2$ kg. C forgets to give that kilogram up.

6. Question 6

   1 mark

   Which is heavier: 3,500 g or 3 kg 600 g?

   A. Cannot compare

   B. 3 kg 600 g

   C. They are equal

   D. 3,500 g

   (1 mark)

   Marking scheme

   B. $3$ kg $600$ g — convert before comparing: $3$ kg $600$ g is $3,600$ g, more than $3,500$ g. The figure $500$ looks larger than $600$ only until the units match.

7. Question 7

   1 mark

   A lorry can carry 3,000 kg. It carries boxes of 75 kg each. How many boxes?

   A. 40

   B. 45

   C. 30

   D. 50

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8. Question 8

   1 mark

   A sack of potatoes weighs 25 kg. Find the mass of 8 such sacks.

   A. 220 kg

   B. 180 kg

   C. 160 kg

   D. 200 kg

   (1 mark)

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9. Question 9

   2 marks

   At a market, a sack of maize has a mass of $45$ kg and a sack of beans has a mass of $38$ kg. How much heavier is the sack of maize than the sack of beans?

   (2 marks)

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10. Question 10

    1 mark

    A packet of sugar has a mass of $2$ kg. What is its mass in grams? (Remember $1$ kg $=1000$ g.)

    A. $200$ g

    B. $2000$ g

    C. $20000$ g

    D. $20$ g

    (1 mark)

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11. Question 11

    1 mark

    A pupil's bag has books weighing 1 kg 350 g, 850 g and 500 g. Total mass?

    A. 2 kg 500 g

    B. 2 kg 700 g

    C. 2 kg 600 g

    D. 3 kg 200 g

    (1 mark)

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12. Question 12

    1 mark

    How many 500 g packs can be made from a 5 kg bag?

    A. 20

    B. 5

    C. 10

    D. 15

    (1 mark)

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