A. Pronunciation of numbers
Notice how we say the following:
- 28% twenty-eight per cent
- 1¾ one and three quarters
- 4² four squared
- 10×12m ten metres by twelve metres
- 4/5 four fifths
- 7³ seven cubed
- 9/13 nine thirteenths / nine over thirteen
- 8⁴ eight to the power of four
- 10.3 ten point three
- 32°C or F thirty-two degrees Celsius or Fahrenheit
Decimal fractions are separated by a dot and not a comma in English and this is pronounced point.
Note how commas are used to separate each set of three numbers in long numbers:
1,623,457 = one million, six hundred and twenty-three thousand, four hundred and fifty-seven.
Telephone numbers are usually said like this: 01223 20675 = oh one double two three, two oh six, seven five.
Language help
When saying a long number, you pronounce each set of up to three digits separately with rising intonation, until the last set, where the intonation falls at the end to make it clear that the number is complete.
B. Two-dimensional shapes
The corresponding adjectives are:
circular,
pentagonal,
rectangular,
triangular,
square,
octagonal,
oval.
A rectangle has four right angles. A pentagon has five sides.
A circle is cut in half by its diameter. Its two halves can be called semi-circles.
The radius of a circle is the distance from its centre to the circumference.
C. Three-dimensional shapes
The corresponding adjectives are:
spherical,
cubic,
pyramidal,
spiral.
The two halves of a sphere can be called hemispheres.
D. Arithmetic
+ addition
− subtraction
× multiplication
÷ division
2x + 3y − z = 3z⁄4x Two x plus three y minus z equals three z divided by four x or three z over four x
6 × 7 = 42 Six times / multiplied by seven is forty-two or six sevens are forty-two.
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