\n This interactive helps learners read the mass shown on different scale faces.\n Students can practise reading in grams and kilograms,\n compare different scales, and explain how they know the answer.\n
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\n Big idea: To read a scale correctly, first identify the maximum value,\n then work out the value of each small division, and finally count carefully to the pointer.\n
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Learning Goals
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Read a scale accurately in grams or kilograms.
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Work out the value of one small division.
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Choose the correct unit for the answer.
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Explain how the answer was found.
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How To Use
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Choose a scale or a random question from the first menu.
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Watch the pointer settle, or switch to still mode for an instant reading.
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Enter the answer using the response field or dropdown.
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Tap g or kg to change the unit shown.
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Use Hint for guided help, not just the answer.
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Use Replay to see the same reading again.
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Use Reset for a new question on the same scale.
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What To Look For
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What is the largest value on this scale face?
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How many small divisions are there between two labelled marks?
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What is each small division worth?
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Is the answer better written in grams or kilograms?
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Activities To Try
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1. Quick Start
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Choose the 1.00 kg scale.
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Read 5 different random positions in grams.
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Say the value of each small division before answering.
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2. Unit Switch
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Read one scale position in grams.
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Switch the display and read the same position in kilograms.
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Discuss how the number changes but the mass stays the same.
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3. Compare The Scale Faces
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Try the 1.00 kg, 4.00 kg, and 5.0 kg scales.
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For each one, identify the value of one small division.
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Explain which scale is easiest to read and why.
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4. Guided Practice With Hints
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Attempt the reading first without help.
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Use Hint 1 to identify the scale range and the correct unit.
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Use Hint 2 to work out the value of each small division and count from the nearest labelled mark.
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5. Everyday Objects
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Select the apple, pineapple, or $1 coin.
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Estimate the mass before reading the scale.
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Compare your estimate with the actual reading.
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Challenge Questions
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How do you know whether each small division is worth 20 g, 50 g, or 100 g?
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Which is harder to read: a scale with more divisions or fewer divisions? Why?
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If the pointer is halfway between two small marks, what should you do?
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Can you explain your answer in a full sentence using the correct unit?
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Teacher Suggestions
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Ask pupils to say the division value aloud before giving the reading.
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Encourage pupils to explain their thinking, not just state an answer.
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Use still mode for first attempts and animated mode for replay and discussion.
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Pair pupils and let one student read while the other checks the unit and counting.
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\n Success means more than getting the correct number. A strong answer includes the\n correct value, the correct unit, and a clear explanation\n of how the scale was read.\n
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