数学-加法
What's 3 plus 2?
3加2是多少？
3 plus 2 equals 5.
3加2等于5。
Look! 2 more birds came. How many birds are there in all?
看！多来了2只鸟。一共有多少只鸟？
There were 3 birds already. So there are 5 birds all together.
原本有3只，所以总共有5只。
If we write it in a number sentence, it's 3+2=5.
如果我们写成数学公式的花。就是3+2=5。
5 is 2 more than 3.
5是2加上3。