Repair a Teen Label That Does Not Match
Count the full ten, then the extra marks.
About 12 minutes, plus any extended practice
Supplied materials
- Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
- Supplied worked-case record: A drawing has ten and five extra marks but is labeled 12.
- All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.
Learn the idea
A count label is correct only when it matches the objects. Check the full ten and the extra ones separately. A mislabeled teen drawing can be repaired by changing the label or changing the objects, but first explain exactly which count is wrong.
Count the full ten, then the extra marks. Join those counts and compare the total with the label. Give the correct teen numeral without adding or removing objects in this exercise.
Check the drawing before trusting its label. Repairing the label keeps all original marks unchanged. Write the full ten count and extra count beneath the drawing.
- Write the full ten count and extra count beneath the drawing.
- Follow the worked example. Point to each number or shape feature and say what it tells you.
- Count the full ten, then the extra marks.
- Try the question and then the three practice questions. Check your answers and explain any change you make.
See the method in action
A drawing has ten and five extra marks but is labeled 12. Ten plus five is 15, so relabel it 15. The drawing itself need not change. To keep a label of 12 instead, you would need only two extras, but that is a different repair. Check the drawing before trusting its label. Repairing the label keeps all original marks unchanged. Write the full ten count and extra count beneath the drawing.
Check your reasoning
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Helpful tips
- Check the drawing before trusting its label.
- Repairing the label keeps all original marks unchanged.
See the answer and explanation
13
Count the actual extras and join them to ten. The result is 13.
Take it further
Ten and seven extras are labeled 16. Expected correction: 17.
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More practice: try new cases
Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.
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Check the subject sources
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