Lesson: Adding Numbers up to 20 on a Number Line Elementary School • Mathematics • 2nd Grade • Elementary School Mathematics 1st GradeMathematics
In this lesson we will learn how to add within 20 by jumping forward in ones on a number line.
Sample Question Videos
Use the number line to complete the following addition sentence.
On this number line, Elizabeth started at 13 and counted forward until she reached 18.
Which number sentence describes what Elizabeth did?
I start at a number and count forward. Does this represent adding or subtracting?