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Weight Measurements Mastery

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Weight Measurements Mastery

Help Kai pack a market basket. Use suitable metric mass units to choose sensible units, read measurements and solve the packing problems. Show your thinking where you can.

Choose the best unit

Circle the more sensible unit for each item. Think: would you usually measure it in grams or kilograms?

1.A small apple is usually measured in…
  • grams (g)
  • kilograms (kg)
2.A full sack of potatoes is usually measured in…
  • grams (g)
  • kilograms (kg)
3.Complete the fact: 1 kilogram = grams.

Read the scale

The scale has evenly spaced marks. Each small step adds 10 g.

4.The scale starts at 0 g and has marks at 0, 10, 20, 30, 40 and 50 g. What mass is shown?
01020304050
5.A pear weighs 180 g and a plum weighs 90 g. Which fruit is heavier, and how much heavier is it?

Pack the basket

Kai is choosing goods for a customer. Use the measurements below to help.

Bag of oats: 500 g

Loaf of bread: 750 g

Bag of apples: 1 kg

6.How many grams do the bag of oats and the loaf of bread weigh altogether?
7.The bag of apples weighs 1 kg. Is it heavier or lighter than the loaf of bread? Explain using grams or kilograms.
8.A customer asks for 2 kg of flour. The scale shows 1 kg so far. How much more flour is needed?

Estimate, then check

A good estimate is a sensible guess made before measuring.

9.Which is the most sensible estimate for a single kiwifruit: 5 g, 70 g or 5 kg?
  • 5 g
  • 70 g
  • 5 kg
10.Kai estimates a pumpkin weighs 3 kg. The scale reads 4 kg. Was the estimate too high or too low, and by how much?
11.Why might estimating a mass before using a scale be useful? Give one reason.

3 printable pages

  • Weight Measurements Mastery, page 1 of 3: Choose the best unit, Read the scale

    Page 1

  • Weight Measurements Mastery, page 2 of 3: Pack the basket

    Page 2

  • Weight Measurements Mastery, page 3 of 3: Estimate, then check

    Page 3

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