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Lesson: Addition within 20 by Counting on a Number Line

Video

03:53

Sample Question Videos

Worksheet • 14 Questions • 7 Videos

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?

  • A13 + 5 = 18
  • B18 − 4 = 14
  • C13 + 1 = 18
  • D18 − 5 = 13
  • E13 + 3 = 18

Q5:

Fill in the missing number.

Use the number line if you need to.

Q6:

Count on to add.

Find the total.

  • A 14
  • B 15
  • C 16

Q7:

Count on to add.

Find the total.

  • A 13
  • B 14
  • C 12

Q8:

On this number line, Amira started at 4 and counted forward three times.

Which of these describes what Amira did?

  • Aadded three
  • Badded four
  • Ctook away three
  • Dtook away seven
  • Eadded seven

Q9:

Fill in the missing number.

Use the number line if you need to.

Q10:

Fill in the missing number.

Use the number line if you need to.

Q11:

Count on to add.

Dina started this calculation on a number line. Finish the calculation to find the total.

  • A 16
  • B 17
  • C 18

Q12:

I start at a number and count forward. Does this represent adding or subtracting?

  • Asubtracting
  • Badding

Q13:

To find the sum of 1 1 + 6 , we can use a number line.

  • Start at 11
  • Count on 6
  • Land on 17

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.

  • A3 + 5 = 8
  • B8 − 4 = 4
  • C3 + 4 = 8
  • D8 − 5 = 3
  • E3 + 3 = 8
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