Answer the questions.

1 How much is eight and seven?

2 How much is twenty one multiplied by three?

3 How much is sixty eight divided by two?

4 How much is ninety nine divided to three minus thirty three?

5 How much is seventy eight and fifteen?

6 How much is forty nine and thirteen divided by seven?

7 How much is five times sixteen minus eighty?

8 How much is twenty one minus eight and twenty three?

9 How much is ten times seven minus thirty divided by twenty

10 How much is seventy nine and twelve?

We use the word "naught" in arithmetic. "Zero" is used to read temperatures and countdowns.

• 4-4=0 (four minus four isnaught);

• T 0⁰ (zero degrees) 5, 4, 3, 2,1,0! (five, four, three, two, one, zero!)

4. Look how to read high numbers:

108A hundred and eight 1,074One thousand and seventy four

336Three hundred and thirty-six 3,469Three thousand, four hundred

And sixty-nine

Read aloud:

445; 801; 1,760; 112; 14,001; 8,080; 7,467; 365; 142; 9,990 24,582; 40,749; 15,094; 3,276; 56,916; 5,473; 20,500; 3,250; 7,612; 509; 250; 1,390

108A hundred and eight 1,074One thousand and seventy four

336Three hundred and thirty-six 3,469Three thousand, four hundred

And sixty-nine

Read aloud:

165,451; 346,298; 111,023; 750,000; 2,683,598; 83,075,560; 6,450,003; 456,023; 48,708,058; 476,689; 709,448; 37,891; 38,902,166; 250,000; 3,500,000; 1,246,975

5. But notice how we read years:

Read aloud: 1773; 1875; 1906; 1948; 1990; 2000; 2005; 2007; 1010; 2014; 2017

6. This is the way we read fractions:

Read aloud:

Ask each other: "How much is..."

7. Notice how to say some other arithmetical symbols:

2² two squared

2³two cubed

2⁴to to the power of four

square root

cube root

pi

Read aloud: ; ; 9²; ; 2⁴; ; ∙ 3⁴; 2⁵ – ;

Ask each other: "How much is..."

UNIT REVISION

1. Transform sentences from Active to Passive Voice:

Even if we don't do any mistakes, nearly all measurements are still inexact. We use the term 'error' for that inexactness, or we also call it "measurement uncertainty". Scientists do not settle the precise distinction between measurement error and mistakes, it varies by country. Calibration is the process where specialists apply metrology to measurement equipment and processes to ensure conformity with a known standard of measurement.

Metrology laboratories are places where specialists perform both metrology and calibration work. In calibration laboratories they generally do calibration work only. They often control temperature, humidity, vibration, electrical power supply, radiated energy and other characteristics. We can divide the technicians by major discipline areas: physical, dimensional, electrical, RF, microwave and so on.

2. In large calibration laboratories, there are three groups of metrology and calibration workers. Read about their work and rewrite sentences from Active to Passive Voice:

Investigation work is performed in addition to calibrations by metrology technicians. The proven principles are also applied to known situations, and unexpected or contradictory results are evaluated. The equipment needed for calibration is arranged by set-up people and its correct work is verified. The calibration procedures are executed and data are collected by operators. Set-ups are dismantled, the components are checked for damage and then the components are put into a stored state by tear-down people.

Now tell what don't set-up people, tear-down people and operators do.

Example

- Set up people don't execute procedures, arid...

Date: 2015-12-24; view: 912