Everyday maths 2 (Wales)
Everyday maths 2 (Wales)

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2.1 Calculations with large numbers

The best way to get used to these types of calculations is to go straight into an example.

Example: Calculations with large numbers

Calculate the total population of Malta (0.4 million) and Cyprus (1.2 million).

Method 1

Work in shortened form:

  • 1.2 + 0.4 = 1.6 million

Method 2

Write the numbers in full:

  • 1 200 000 + 400 000 = 1 600 000 (1.6 million)

Activity 7: Calculations with large numbers

  1. Calculate the total turnover for Cambria Trading over the first quarter (3 months).

Table 3 Cambria Trading turnover
MonthProfit (£ million)
January1.2
February0.9
March0.85
April1.1
May1.02
June0.87
July1.19
August0.98
September1.05
October1.08
November1.8
December1.65
  1. Calculate the turnover of the last quarter.

  2. Calculate the difference in turnover between the first and last quarters.

  3.  

    • a.Which month had the largest turnover?

    • b.Which month had the smallest turnover?

    • c.What is the difference between the largest and smallest turnovers?

Answer

  1. Profit in 1st quarter 1.2 + 0.9 + 0.85 = £2.95 million

  2. Profit in last quarter 1.08 + 1.8 + 1.65 = £4.53 million

  3. The difference is 4.53 − 2.95 = £1.58 million

  4.  

    • a.November had the largest turnover at £1.8 million.

    • b.March had the smallest at £0.85 million.

    • c.The difference is 1.8 − 0.85 = £0.95 million.

Summary

In this section you have learned how to:

  • write large numbers in full and shortened forms

  • round large numbers
  • add and subtract large numbers.

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