Number Line Adventures: Solving Math Problems!

Math Grades 1st Grade 4:39 Video
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Lesson Description

Learn how to use number lines to solve addition problems! We'll count on the number line to find missing numbers and solve fun word problems.

Video Resource

Solving Problems With Number Lines | Math | 1st Grade | Kids Academy

Kids Academy

Duration: 4:39
Watch on YouTube

Key Concepts

  • Number lines as a visual tool for addition.
  • Counting on to add.
  • Solving for missing numbers in addition equations.

Learning Objectives

  • Students will be able to use a number line to solve addition problems.
  • Students will be able to identify the missing number in an addition equation.
  • Students will be able to solve simple word problems using a number line.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students what they know about number lines. Show the video 'Solving Problems With Number Lines | Math | 1st Grade | Kids Academy.' Explain that they will be learning how to use number lines to help them solve math problems.
  • Number Line Basics (10 mins)
    Draw a number line on the board from 0 to 20. Review how to count on the number line. For example, start at 5 and count on 3. Where do you end up? Do several examples together.
  • Solving Addition Problems with Number Lines (15 mins)
    Present addition problems like 7 + ? = 10. Explain how to start at 7 on the number line and count on until you reach 10. The number of jumps is the missing number. Do several examples together, encouraging student participation.
  • Word Problem Practice (15 mins)
    Present word problems similar to those in the video, such as 'Mary has 8 stickers. She wants to have 14 stickers. How many more stickers does she need?' Guide students to identify the starting number and the target number, and then use the number line to count on and find the solution.
  • Independent Practice (10 mins)
    Provide students with a worksheet containing number line addition problems and word problems. Allow them to work independently to solve the problems, using the number line as a tool.

Interactive Exercises

  • Number Line Hop
    Draw a large number line on the floor with tape. Call out addition problems and have students physically hop along the number line to find the answer.
  • Missing Number Cards
    Create cards with addition equations where one number is missing (e.g., 5 + ? = 8). Have students use a number line to find the missing number and write it on the card.

Discussion Questions

  • What is a number line and how can it help us?
  • Can you think of a time when you might use addition in your daily life?
  • How is counting on a number line similar to counting with your fingers?

Skills Developed

  • Addition skills
  • Problem-solving skills
  • Number sense
  • Using visual aids for math

Multiple Choice Questions

Question 1:

What helps us count when we add?

Correct Answer: A number line

Question 2:

If you start at 3 and count on 2, where do you end up?

Correct Answer: 5

Question 3:

What number is missing? 5 + ___ = 8

Correct Answer: 3

Question 4:

Mary has 4 apples. She wants 7. How many more does she need?

Correct Answer: 3

Question 5:

If you start at 9 and count on 1, where do you end up?

Correct Answer: 10

Question 6:

What number is missing? 2 + ___ = 6

Correct Answer: 5

Question 7:

Tom has 6 cars. He wants 10. How many more does he need?

Correct Answer: 5

Question 8:

If you start at 11 and count on 2, where do you end up?

Correct Answer: 13

Question 9:

What number is missing? 7 + ___ = 9

Correct Answer: 2

Question 10:

Sue has 5 balloons. She wants 9. How many more does she need?

Correct Answer: 5

Fill in the Blank Questions

Question 1:

We can use a _______ _______ to help us add.

Correct Answer: number line

Question 2:

When we add on a number line, we _________ on.

Correct Answer: count

Question 3:

If 4 + ____ = 6, the missing number is _______.

Correct Answer: 2

Question 4:

To solve 5 + 3, start at 5 and count on ____.

Correct Answer: 3

Question 5:

A number line goes in order from smallest to ________.

Correct Answer: biggest

Question 6:

If 1 + ____ = 5, the missing number is _______.

Correct Answer: 4

Question 7:

Counting on the number line is like taking ______.

Correct Answer: jumps

Question 8:

If 6 + ____ = 8, the missing number is _______.

Correct Answer: 2

Question 9:

We can draw our own __________ _______ if we don't have one.

Correct Answer: number line

Question 10:

If 3 + ____ = 7, the missing number is _______.

Correct Answer: 4

Educational Standards

CCSS.Math.Content.1.OA.A.1:Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. CCSS.Math.Content.1.OA.C.5:Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). CCSS.Math.Content.1.OA.D.8:Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.

Teaching Materials

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