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Mathematics

Number concept

Educator section

Memorandum

  • 203; 190; 173; 208; 236; 222; 253; 471; 570; 459; 423; 472; 430; 343; 453; 357; 315

1 000 000

Leaner section

Content

Activity: to perform mental calculations [lo 1.8.2]

Competition time!

  • Compete with a friend to see who can complete this arrow diagram CORRECTLY first! You may not use a pocket calculator.

The remarkable million!

You already know the following:

10 x 10 = 100

100 x 10 = 1 000

1 000 x 10 = 10 000

10 000 x 10 = 100 000

Look carefully at the above pattern and fill in:

100 000 x 10 = ______________________________________________________

Correct! 100 000 x 10 = 1 000 000

We read: 1 000 000 is one million

  • In the notation column it looks like this:
Million Hundred thousand Ten thousand Thousand Hundred Ten One
M HTh TTh Th H T U
1 000 000 100 000 10 000 1 000 100 10 1
  • Let’s read these big numbers:

4 721 568 is read as 4 million 721 thousand 568

Thus: Four million seven hundred and twenty one thousand five hundred and sixty eight

Note!

We group figures (digits) in threes from the right.

In the example the first space from the left tells us how many millions we have. The second space from the left indicates how many thousands there are.

E.g. 3 (million) 268 (thousand) 413

Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.9: We know this when the learner performs mental calculations involving:

1.9.1: addition and subtraction.

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Source:  OpenStax, Mathematics grade 6. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11030/1.1
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