Lesson: Comparative Bar Models: Numbers up to 20 Elementary School Mathematics 1st Grade • Go Math! • Grade 2 • Common Core • enVisionmath2.0 • Grade 2 • Volume 1 • Common CoreMathematics
In this lesson, we will learn how to solve one-step additive comparison problems with numbers up to 20 by drawing a comparative bar model.
Sample Question Videos
Natalie took 9 photos, and Olivia took 2 photos. How many more photos did Natalie take than Olivia?
Michael has 15 candies, but Benjamin has 5.
How many more candies does Michael have?
How many candies do the boys have in total?
Use the part-whole model to find the missing number: .