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Lesson 8 of 9

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7 min

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Six ideas, six checks. Here is a table to look back at.

Data Handling and Presentation — every chart move
MoveHow it goes
Judge a sampleA small group may not match the whole class.
Read a tallyCount the groups of five. Then add the loose strokes.
Read a pictographCheck the key. Multiply pictures by the key.
Read a bar graphRead the scale. Then read the bar against it.
Answer from a graphFind the right bars. Then compare or add.
Choose a chartTally live. Pictograph small. Bar graph big.

You ask five friends how they get to school. Three say bus. What can you honestly say?

  • Most students in the whole class come by bus
  • Most of these five friends come by bus. That does not tell you about the class
  • Nothing, because five is too few to count

A tally shows 17 cars. How many full groups of five, and how many left over?

  • 2 groups, and 7 left over
  • 3 groups, and 2 left over
  • 4 groups, and 3 left over

A pictograph key says 1 picture = 2 books. A row has 6 pictures. How many books?

  • 6 books
  • 12 books
  • 3 books

One gridline is 10 mm of rain. A bar reaches 7 gridlines. How much rain is that?

  • 7 mm
  • 70 mm
  • 17 mm

Votes: cricket 18, kabaddi 10, badminton 14, football 8. How many more chose cricket than kabaddi?

  • 18
  • 8
  • 28

You must count votes as hands go up, right now. What suits best?

  • A bar graph
  • Tally marks
  • A pictograph

Open Chapter 4, Data Handling and Presentation, in your book. Every chart in it, you have already built.

Next: Prime Time — factors, multiples, and primes.

Reveal every answer to finish this lesson.