Numbers, units and arithmetic
Numbers, units and arithmetic

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

Numbers, units and arithmetic

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.

MU120_4M1

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has over 40 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus