Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 Which of these would you use to find how heavy a bag of apples is?
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Mass is measured with kitchen scales.
2 This jug has marks every 100 mL. Write what one mark is worth in mL, and how much water is in the jug in mL.
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One mark is 100 mL, and the water is at the fourth mark, so 400 mL.
3 How many centimetres are there in 1 metre?
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100 cm.
Level 2 · Core
4 A drum holds 20 litres when full and is about a quarter full. About how much is in it?
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20 ÷ 4 = 5 L. (25 L would not fit in a 20 L drum.)
5 These scales have marks every 100 g. Write what one mark is worth in grams, and the mass the needle shows in grams.
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One mark is 100 g and the needle is at the fourth mark, so the mass is 400 g.
6 How many millilitres are there in 2 litres?
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2 × 1000 = 2000 mL.
Level 3 · Challenge
7 A jug holds 1 litre when full and has 250 mL of juice in it.1 The jug is a quarter full.
2 750 mL more would fill it.
3 The jug is half full.
Which statements are correct?
2 750 mL more would fill it.
3 The jug is half full.
Which statements are correct?
Show worked solution
250 is a quarter of 1000 (1 ✓, 3 ✗), and 1000 − 250 = 750 mL would fill it (2 ✓). 1 and 2.
8 A parcel has a mass of 1200 g. Write its mass rounded to the nearest whole kilogram, and how many grams more than 1 kg it is.
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1200 g is nearer to 1000 g than to 2000 g, so 1 kg, and it is 1200 − 1000 = 200 g over.
9 A bucket holds 10 L and is about half full. About how many litres of water are in it?
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5 litres.