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Teach Connecting Math Concepts F (6)

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  1. Module introduction
    5 Topics
  2. Overview
    21 Topics
    |
    1 Test
  3. Connecting CMC to Oz-e-maths
    14 Topics
    |
    1 Test
  4. Place value and rounding, fraction analysis tracks
    20 Topics
    |
    1 Test
  5. Equivalence: fractions/decimals/per cents, inverse operations, ratio and proportion word problems tracks
    17 Topics
    |
    1 Test
  6. Word problems: basic operation track
    17 Topics
    |
    1 Test
  7. Algebraic translation word problems and probability tracks
    17 Topics
    |
    1 Test
  8. Column multiplication, division, mental math and mixed-number operations tracks
    19 Topics
    |
    1 Test
  9. Coordinate system, data analysis, and fraction operations tracks
    19 Topics
    |
    1 Test
  10. Decimal operations, exponents, simplification and geometry tracks
    17 Topics
    |
    1 Test
  11. Motivating students and independent work
    21 Topics
    |
    1 Test
  12. Mastery tests
    21 Topics
    |
    1 Test
  13. Bringing it all together
    21 Topics
  14. Module evaluation survey
    1 Topic

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Rounding

In lesson twenty-six work with rounding begins. Students begin by rounding one, two and three-digit numbers to the tens place.

They identify the two tens numbers closest to the given number, then determine which tens number is closer.

The process is:

  • Display and say, ‘Each number is between two tens numbers. Tens numbers end in zero.’
  • Point to 24 and say, ’24 is between 20 and 30.’ Point to 68, ask, ‘What is 68 between?’ and signal.
  • Continue the process with the other three numbers.
  • Say, ‘This time you’ll tell me which tens number is closer to the number shown.’ Point to 24, say ’24 is between two tens numbers. Which numbers?’ and signal. Ask, ‘Which tens number is 24 closer to?’ and signal.
  • Continue the process with the other three numbers.

Turn to page 38 in CMC F Teacher’s Guide. Practise teaching lesson 26, exercise 5, with no student errors. Read additional exercises and teaching notes to page 40.

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