+ plus 加
Addition 加法
= equals 等于
Let's learn addition.
Say it out loud.
1 + 1 = 2 One plus one equals two.
2 + 2 = 4 Two plus two equals four.
3 + 3 = 6 Three plus three equals six.
Let's guess.
1 + ? = 3 One plus what equals three?
I know, I know.
O.k. Johnny?
2, 1+2=3
Very good!
Let's guess.
2 + ? = 9 Two plus what equals nine?
I know, I know.
O.k. Amy?
7, 2+7=9
Very good!