In this lesson, we will learn how to solve problems to calculate the lengths of objects by adding and subtracting within 100.
Q1:
This paper sheet is 90 centimeters long.
Q2:
2 days ago, Mason’s pencil was 13 cm long. Today, its length is 3 cm less. How long is Mason’s pencil today?
Q3:
Consider the two buildings shown.
Which building is shorter?
How much shorter is it?
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