分数、小数、百分数、数学式加减乘除以及数量的读法
- 格式：docx
- 大小：15.49 KB
- 文档页数：2
分数、小数、百分数、数学式加减乘除以及数量的读法
一、Decimals小数
表示小数时,小数点前面的基数词和前面讲的基数词的读法相同；
小数点后的数字则必须一一读出
0．0089→（zero ／naught）point zero zero eight nine
1．36→one point three six
小数点读作point，o读作zero或o［ou］，整数部分为零时，可以省略不读。
0.4 zero point four或point four 零点四。
二、Fractions分数
（1）表示分数时,分子要用基数词,分母用序数词.
1/2 = a (or one) half
1/3 = a (or one) third
1/4 = a quarter or one fourth
1/5 = a (or one) fifth
2/3 = two thirds
3／7 = three seventh
9/10 = nine tenths
＊比较复杂的分数如：24／789,多读作twenty four over seven hundred and eighty nine.
（2）如果分子大于1,分母必须用复数形式：
53/4 = five and three quarters
15/64= fifteen over (or by) sixty-four
三、百分数
百分数由percent表示,百分号％读作percent,应用时常与by连用.
15% = fifteen per cent
4‰ = four per mill
0．68％→zero point six eight percent
6％→six percent
369％→three hundred and sixty nine percent
例：The output of steel went up by 20 percent．钢产量增长20％.
The price of cotton was reduced by 20 percent．棉花的价格下降了20％.
四、Mathematic Forms 数学式加减乘除
(1) Addition 加法
1+2=3 One and two are three.
2+3=5 Two plus three equals five.
4+0=4 Four and nought is equal to four.
45+70+152=267 45,70 and 152 added are (or make) 267
the sum (or total) is 267.
(2)Subtraction 减法
9-4=5 Nine minus four equals (or is equal to) five.
15-7=8 Seven from fifteen leaves eight.
23,654-8,175=15,479
8,175 (take or subtracted) from 23,654 leaves 15,479.
The difference (or The remainder) is 15,479.
Nine from five won`t go.
(3)Multiplication 乘法
1×0=0 One multiplied by nought equals nought.
1×1=1 Once one is one.
2×1=2 Twice one is two.
3×5=15 Three times five is fifteen
6×0=0 Multiply six by nothing, and the result is nothing.
(4)Division 除法
9÷3=3 Nine divided by three makes (or is equal to) three.
20÷5=4 Five into twenty goes four times.
4567÷23=198余13 23 into 4567 goes 198 times, and 13 remainder.
The quoctient is 198, and 13 remainder.
五、数量表示法
表示长、宽、高、面积等，用基数词+单位词（meter，foot，inch，kilogram等）+ 形容词（long，wide，high等）表示，或者用基数词+单位词+in+名词（length，width，height，weight等）表示。
two meters long或two meters in length 2米长。
three feet high或three feet in height 3英尺高。
four inches wide或four inches in width 4英寸宽。
例：This box is 2 kilograms in weight. 这个盒子有两千克重。
The city wall of Xi'an is 12 meters wide and 12 meters high. 西安城墙是12米宽，12米高。
