英語表現 By Tohei Moritani 森谷東平

A. Reading numbers and equations in English

1		10^3 10^6 10^9 10^12 10^4	10^3 10^6 10^9 10^12 10^4 thousand million billion trillion ten thousand
2	Decimal	3.45	three point four five
3	Fraction		a half, one half a third, one third two thirds three tenths one and a half three fourths
4	Addition	12 + 5 = 17	・Twelve plus five equals seventeen. ・Twelve plus five makes seventeen ・The sum (total) of 12 and 5 is 17.
5	Subtraction	12 – 5 = 7	・12 minus 5 equals (is) 7. ・Subtract 5 from 12, the answer is (yields) 7.
6		98 – 7 + 2 = ?	・Subtract 7 from 98 and add 2, what is the result?
7	Multiplication	20 x 3 = 60	・Twenty multiplied by 3 equals 60. ・Twenty times 3 is 60. ・Multiply 20 by 3 to get 60.
8	Division		・20 divided by 2 equals (is, makes) 10. ・Half of 20 is 10.
9			・21 divided by 3 gives 7. ・One-third of 21 is 7.
10			two fold, two times, two x, power of two, double ten-fold, ten times, power of ten
11	Root		square root of cube root of n-th root of
12	Exponent		squared cubed to the fourth x (raised) to the fourth (power)
13			to the minus two (power) to the one-third (power)
14			ten to the zero power ten to the -th (power)
15	Rounding		Twenty divided by two point two is nine point 0 nine; it is nine point one when rounding (off).
16	Equations		k times sub equals the integral of dm.

· We increased output by a factor of five.

· If the mass of a weight is doubled in a simple spring, by what factor does the period change?

· By what factor does the kinetic energy of a car change when its speed is tripled?

·

· This rope is three times longer than that one. = This rope is three times as long as that one.

· How many times heavier is an elephant than a mouse?

B. Common Prefixes

Power	Prefix	Abbreviation	Power	Prefix	Abbreviation
			10^-2	centi	c
10^3	kilo	k	10^-3	mili	m
10^6	mega	M	10^-6	micro
10^9	giga	G	10^-9	nano	n
10^12	tera	T	10^-12	pico	p
10^15	peta	P	10^-15	femto	f

C. Geometrical figures

D. Tables

E. Graphs