NUMBERS AND CALCULATIONS PROFESSIONAL ENGLISH IN USE FOR ENGINEERING

 

PROFESSIONAL ENGLISH IN USE FOR ENGINEERING UNIT 8. NUMBERS AND CALCULATIONS

 

A Decimal and fractions A manufacturer is thinking about giving both metric measurements (for example, millimetres) and imperial measurements (for example, inches) in its product specifications. One of the company’s engineers is giving his opinion on the idea in a meeting. B Addition, subtraction, multiplication and division. During a TV programme about garden design, the presenter is explaining the calculations required to make a large setsquare which can be used for setting out. EXERCISES 8.1 Write the numbers in words. Look at A opposite to help you. 1) 1.793 ______________ ______________ ______________ ______________ ______________ 2) 1/100 mm ______________ ______________ ______________ ______________ millimetre 8.2 Complete the descriptions of the numbers using words from A opposite. 1) 0.25 = 1/4 The first number is a decimal, and the second is a ____________________. 2) 0.6368 ≈ 0.637  The second number is _______________ _______________ to three _______________ _______________. 8.3 Complete the calculations using the words in the box. Sometimes there is more than one possible answer. Look at B opposite to help you. divided minus plus square root subtract times less multiplied square squared sum     1) 14 + 8 = 22   Fourteen ______________ eight equals twenty-two. 2) 100 x 20 = 2,000  One hundred ______________ twenty is two thousand. 3) 7 x 11 = 77     Seven ______________ by eleven equals seventy-seven. 8.4 Use your knowledge of basic geometry to complete the sentences. Use one of the two words from B opposite to fill each gap. 1. The _____________ of the three angles in a triangle equals 180 degrees. 2. The area of a circle is equal to the  _____________ of its radius  _____________ 3.14.

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