1.Add [æd] v.加；增加
Addition [ə'dɪʃən] n. 加法；添加
Addition sentences 加法算式
Add 7 and 7 to make 14.
7加7得14.
2.Plus 加
Plus sign 加号
Equals sign 等号
Sum 总数；总和
3 plus 7 equals 10.
3加7等于10。
3 + 7= 10 is an addition sentence.
3 + 7= 10是加法算式。
10 is the sum of 3 + 7.
10是3 + 7之和。
Write the addition sentence that describes the picture.
写出描述图片的加法算式。
3.In all 总计；总共
He has 9 pages of stickers. She has 3 pages of stickers. How many pages of stickers do they have in all?
他有9页贴纸。她有三页贴纸。他们一共有多少页贴纸？
There are 2 beach balls in the water. There are 7 beach balls in the sand. How many beach balls are there in all?
水里有两个沙滩球。沙滩上有7个沙滩球。一共有多少个沙滩球？
Altogether adv. 完全地；总共
How many red and green apples altogether?
一共有多少个红苹果和青苹果？
4.Subtract [səb'trækt] 减去；减掉
Subtraction sentence 减法算式
Difference 差
If you subtract 0, you have the same number left.
如果减去0，剩下的数是一样的。
If you subtract all, you have 0 left.
如果你减去所有，你剩下0。
If you subtract 2 from 7, you get 5.
7减2等于5。
7 - 5 = 2 is a subtraction sentence.
7 - 5= 2是减法算式.
2 is the difference.
2是差.
5.Minus 减；减去
Minus sign 减号
9 minus 3 equals 6.
9减3等于6。
15 minus 5 is 10.
15减5等于10。
6.Take away 减去；拿走
He had 7 shovels. He took away 2 shovels. There are 5 shovels left.
他有7把铲子。他拿走了两把铲子。剩下5把铲子。
How many will he have left if he takes 10 away from 11?
如果他从11中拿走10，他还剩多少？
7.Graph n. 图表；曲线图
Bar graph 条形图; 柱状图
Data n. 数据
Venn Diagram 维恩图; 文氏图（用部分重叠的圆表示若干事物之间关系的）
Tally chart 统计图；统计表
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