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In this lesson, we will learn how to add within 20 by counting on a number line and how to write addition sentences describing jumps on the number line.
Count on to add.
Find the total.
Yara was playing a game. First, she moved her counter 4 spaces forward. Then, she moved it 7 spaces forward.
How many spaces from the start is her counter?
Use the number line to complete the following addition sentence.
On this number line, Farida started at 13 and counted forward until she reached 18.
Which number sentence describes what Farida did?
Fill in the missing number.
Use the number line if you need to.
On this number line, Amira started at 4 and counted forward three times.
Which of these describes what Amira did?
Dina started this calculation on a number line. Finish the calculation to find the total.
I start at a number and count forward. Does this represent adding or subtracting?
To find the sum of
, we can use a number line.
So, we now know that
Use a number line to find the sum of
Find the number sentence that matches this number line.
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