［第1回］ 英数字の読み方
英数字の読み方 – 数字(numbers) / 小数（decimals） / 分数(fractions)
注： 同義語は/の後に、言い替え用語は[ ]内に記載。アクセント部分を下線で強調。
| No | 数字例 | 読み方(English reading) |
|---|---|---|
| 1 | 100 | a [one] hundred |
| 2 | 10,000 | ten thousand |
| 3 | 100,000 | A [one] hundred thousand |
| 4 | 525,000 | five hundred and twenty-five thousand |
| 5 | 5,000,000 | five million |
| 6 | 5,000,000,000 | five billion |
| 7 | 5,000,000,000,000 | five trillion |
| 8 | 3.35 | three point three five(*1) / three and thirty-five hundredths |
| 9 | 0.25 | zero point two five(*1) / point twenty-five(*1) / twenty-five hundredths |
| 10 | 0.548 | zero point five four eight(*1) / five hundred forty-eight thousandths |
| 11 | 12.255 | twelve point two five five(*1) / twelve and two hundred fifty-five thousandths |
| 12 | 50−60 （範囲） | fifty to sixty |
| 13 | 5 × 105 | five times ten to the fifth / five times ten to the fifth power / five times ten to the power of five |
| 14 | 5.5 × 10−5 | five point five times ten to the minus five |
| 15 | a⁄b | a over b |
| 16 | ab⁄cd | a times b over c times d |
| 17 | 1⁄η | one nth / one over n |
| 18 | 1⁄2 | one half / one-half / a half |
| 19 | 1⁄3 | one third / one-third / a third |
| 20 | 1⁄4 | one quarter / one-quarter / a quarter |
| 21 | 3⁄4 | three quarter / three-quarter |
| 22 | 1⁄5 | one fifth / one-fifth / a fifth |
| 23 | 2⁄3 | two thirds / two-thirds |
| 24 | 4⁄3 | four over three / four thirds / four-thirds |
| 25 | 1⁄10 | one tenth / a tenth / one-tenth |
| 26 | 1⁄100 | one hundredth / a hundredth |
| 27 | 1⁄1000 | one thousandth / a thousandth |
| 28 | 5⁄8 | five eighths / five-eighths |
| 29 | 125⁄205 | a [one] hundred (and) twenty-five over two hundred (and) five |
| 30 | 52⁄5 | five and two-fifths |
| 31 | 25⁄215 | twenty-five over two hundred (and) fifteen |
