In this lesson, we will learn how to use a number line to subtract within 20 by counting back and how to write subtraction sentences describing jumps on a number line.
Q1:
Robert was playing a game. First, he moved his counter 8 spaces forward. Then, he moved it 3 spaces backward.
How many spaces from the start is his counter?
Q2:
Count back to subtract.
Find the difference.
Q3:
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