### １）数字と数式の読み方1

 1 103   106   109   1012   104 103          106     109     1012     104 thousand  million  billion  trillion  ten thousand 2 小数         Decimal 3.45 three point four five 3 分数         Fraction a half,  one half       a third     two thirds    three tenths      one and a half    three fourths 4 足し算　Addition 12 + 5 = 17 ・Twelve plus five equals seventeen.  ・Twelve plus five makes seventeen.  　  ・The sum (total) of 12 and 5 is 17. 5 引き算　Subtraction 12  ー　5 = 17 ・Twelve minus five equals (is) seven.  ・Subtract 5 from 12, the answer is (yields) 7. 6 98 ー 7 + 2 =? ・Subtract 7 from 98 and add 2 wht is the result? 7 掛け算　Multiplication 20 x 3 = 60 ・Twenty multiplied by 3 equals 60.   ・Twenty times 3 is 60.   ・Multiply 20 by 3 to get 60. 8 割り算　Division 20   ÷  4 = 5 ・20 divided by equals (is, makes, gives) 5. 9 20 ÷ 2= 10  21 ÷ 3 = 7 ・Half of 20 gives 10.   ・One-third of 21 is 7. 10 x2      x10 x2:  two fold,  two times,  power of two,  double    x10: ten-fold,  ten times,  power of ten 11 ルート    Root square root of a      cube root of a       n-th root of a 12 べき乗 　Exponent x2   x3   x4 x2                    x3                  x4      x squared        x cubed         x to the fourth [x (raised) to the fourth (power)] 13 x-2       x1/3 x-2                                           x1/3  x to the minus two (power)        x to the one-third (power) 14 100       10x 100                                10x ten to the zero power       ten to the x-th power 15 丸め       Rounding 20 ÷ 2.2 = 9.09 → 9.1 Twenty diveded by two point two is nine point zero nine; it is nine point one when rounding (off). 16 方程式    Equations kx i     = ∫ x dm k times x sub i equals the integral of x dm.

### ２）「何倍」の表現

 ・ We increased output by a factor of five.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　出力を５倍に ・ If the mass of a weight is doubled in a spring, by what factor does the period change?　　　　　　　　　　周期は何倍に？ ・ By what factor does the kinetic energy of a car change when its speed is tripled　　　　　　　　　　　　　運動エネルギーは何倍に？ ・ This rope is three times longer than that one.   =   This rope is three times as long as that o 　　　　　　　あのロープより３倍長い ・ How many times heavier is an elephant than a mous　　　　　　　　　　　　　　　　　　　　　　　　　　　ネズミの体重の何倍か？

### ５）グラフの構成

グラフなど図のタイトルは図の下側に書く。

### ６）文献

１．Anthony T. Tu、「科学英語実用ハンドブック」、化学同人(2008)