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Numbers, units and arithmetic
Numbers, units and arithmetic

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1.3.1 Try some yourself

Activity 2

Write each of the following three numbers in numerals and then place them in ascending order:

  • eight hundred and eight thousand

  • two million and twenty-four

  • nine thousand nine hundred and ninety-eight

Answer

1 Written in numerals, the numbers are:

  808 000,   2 000 024,   9 998

So, in ascending order, we have:

  9 998,    808 000,   2 000 024.

Activity 3

Multiply 2490 by 100.

Answer

2490 × 100 = 249 000

Notice that the digits have moved 2 places to the left and two zeroes have been added at the right.

Activity 4

Now try to answer these questions:

  • (a) Place the following numbers of votes in an election in order, with the smallest first:

      9 999,   5 001,   49 020

  • (b) Multiply 9 494 by 100.

Answer

3 Your answers should be:

  • (a) 5 001,   9 999,   49 020.

  • (b) 949 400.