深圳牛津7AChapter4newwords.ppt

Chapter 4
The world of numbers
New Words
1. decimal adj. 小数的,十进位的
n. 小数
2. fraction n. 分数
a fraction of 一小部分
a fraction of a second 一瞬间
3. degree n. 度,度数
10℃ 10 degrees centigrade
degree n. 学位
the degree of Master of Arts 文学硕士学位
4. percentage n. 百分数
percent n. 百分之一
30% thirty percent
10%的儿童 ten percent of the children
5. positive number 正数
negative number 负数
Match the numbers with the words.
15
5°

15%
decimal
negative number
percentage
fraction
degree
6. odd adj. 奇数的,奇怪的
三是个奇数。
Three is ______ ______ number.
an odd experience 一个奇怪的经历
7. even adj. 偶数的,相等的,均衡的
an even number 一个偶数
我们得分现在相等。
Our scores ______ _______ now.
an odd
are even
8. plus prep. 加
add v. 加,加入
3+4=7
3 ______ 4 _____________________ 7.
= 3 _____ 4 is / are / makes / equals 7.
= ____ 3 ___ 4 is / are / makes / equals 7.
= ___ ____ add 3 to 4, you _____ 7.
A+ A plus
plus
is / are / makes / equals
and
Add to
If you
get
9. equal v. 等于 adj. 平等的
All men are equal in the eye of law.
法律面前人人平等。
10. minus prep. 减
subtract v. 减,减去
8 – 5 = 3
8 _______ 5 _________ 3.
= 5 _________ from 8 is / equals 3.
= If you ________ 5 _____ 8, you ____ 3.
-5 minus five
minus is / equals
subtracted
subtract from
get
11. multiply v. 乘
multiplies, multiplied
times prep. 乘
3 ×5 = 15
_________ 3 _____ 5 __________ 15.
= 3 _________ _____ 5 is / equals 15.
= 3 ______ 5 is / makes / equals 15.
Multiply
by
is / equals
multiplied by
times
12. divide v. 除,除以
12 ÷ 4 = 3
12 ________ _______ 4 is / equals 3.
divide … into …把……分成……
老师把全班分成四个组。
The teacher _________ the class _____
four groups.
divided by
divided into