SAYING NUMBERS & MATHEMATICAL FORMULAS

NUMBERS

Group 1 written   said 1,011  one thousand eleven       21,011   twenty-one thousand

eleven       721,011  seven hundred twenty-one

thousand eleven

Group 2 written   said 1,256,721 one million two hundred fifty-

six thousand seven hundred

twenty-one      31,256,721  thirty-one million two hundred fifty-

six thousand seven hundred twenty-one

      631,256,721   six hundred thirty-one million

two hundred fifty-six thousand seven

hundred twenty-one

HUNDRED, THOUSAND, MILLION, BILLION, TRILLION Group 3 written   said 1,492,638,526   one billion four hundred

ninety-two million six hundred thirty-eight thousand five hundred twenty-six

      41,492,638,526  forty-one billion four hundred

ninety-two million six hundred thirty-eight thousand five hundred twenty-six

941,492,638,526  nine hundred forty-one billion four hundred ninety-two million six

hundred thirty-eight thousand five hundred twenty-six

DECIMALS

2.36=>two point three six

PERCENTAGES

37%=>thirty seven percent

FRACTIONS NUMERATOR-DENOMINATOR

Read the top number as a cardinal number, followed by the ordinal number + ‘s’

3/8=>three eighths NOTE: ¼ =>one quarter, 2/3 => two thirds, ½ one

half

EXPRESSIONSHERE ARE THE DESCRIPTIVE NAMES OF A NUMBER OF IMPORTANT NUMERICAL EXPRESSIONS:

speed 100 mph (miles per hour) weight 80 kg (kilograms) OR 42 lbs (pounds)telephone number 0171 895 7056decimal .087date 12/04/65percentage 75%temperature 28° C (celsius) or 7° F (fahrenheit)height 1 m 89 cmprice $60fraction 8/13score 2-1

“0”HAS SEVERAL OTHER NAMES, DEPENDING ON CONTEXT

zero: formal scientific usage naught / nought: mostly British often in

decimals oh

: used when spelling numbers (like telephone, bank account, bus

nil: in general sport scores, British usage ("The score is two–nil.")

nothing: in general sport scores, American usage ("The score is two–nothing.")

null: used technically to refer to an object or idea related to nothingness.

love: in tennis, badminton, squash and similar sports

x+1 x plus one x-1 x minus one x±1 x plus or minus one xy xy / x multiplied by y x:y divided by (x-y)(x+y) x minus y, x plus y = the equals sign x=5 x equals 5 / x is equal to 5 x≠5 x (is) not equal to 5 x≡y x is equivalent to (or identical with) y x>y x is greater than y x≥y x is greater than or equal to y x<y x is less than y x≤y x is less than or equal to y

0<x<1 zero is less than x is less than 1 0≤x≤1 zero is less than or equal to x is less than

or equal to 1 x2  x squared / x (raised) to the power 2 x3  x cubed x4  x to the fourth / x to the power 4 xn  x to the nth / x to the power n x (−n) x to the (power) minus n x^2 (square) root x / the square root of x x^3 cube root (of) x x^4 fourth root (of) x x^n nth root (of) x (x+y)2 x plus y all squared