Meet Mr. Plus Sign
What things will Mr. Plus Sign add together?
Goal:
Goal:
If you were a plus sign, what would you do? Would you search for things to add on to? Let's follow this plus sign because he's pretty cool!
Mr. Plus Sign watches cars driving down the street. He sees 4 blue cars and 5 green cars. Isn't that neat?
How many total cars does Mr. Plus Sign see? Type the answer to the addition problem below. Addition is the act of adding two numbers together. The answer you get is called the sum. Then click the Check Answer button to see if you answered correctly.
4
+ 5
Click the arrow to see what Mr. Plus Sign adds next.