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.
Q1:
Natalie took 9 photos, and Olivia took 2 photos. How many more photos did Natalie take than Olivia?
Q2:
Michael has 15 candies, but Benjamin has 5.
How many more candies does Michael have?
How many candies do the boys have in total?
Q3:
Use the part-whole model to find the missing number: 14−=8.
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