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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.
Q1:
Count on to add.
Find the total.
Q2:
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?
Q3:
Use the number line to complete the following addition sentence.
Q4:
On this number line, Farida started at 13 and counted forward until she reached 18.
Which number sentence describes what Farida did?
Q5:
Fill in the missing number.
Use the number line if you need to.
Q6:
Q7:
Q8:
On this number line, Amira started at 4 and counted forward three times.
Which of these describes what Amira did?
Q9:
Q10:
Q11:
Dina started this calculation on a number line. Finish the calculation to find the total.
Q12:
I start at a number and count forward. Does this represent adding or subtracting?
Q13:
To find the sum of 1 1 + 6 , we can use a number line.
So, we now know that 1 1 + 6 = 1 7 .
Use a number line to find the sum of 1 3 + 6 .
Q14:
Find the number sentence that matches this number line.
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