Balloon Math: Adding and Subtracting with 10!

Math Grades 1st Grade 18:11 Video
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Lesson Description

Learn how to add and subtract using tens with fun air balloon problems! We'll use T-charts and base ten blocks to help us check our answers.

Video Resource

Adding and Subtracting with 10 - 1st Grade | Math | Kids Academy

Kids Academy

Duration: 18:11
Watch on YouTube

Key Concepts

  • Adding 10 to a number
  • Subtracting 10 from a number
  • Using base ten blocks to visualize addition and subtraction
  • Using a T-chart to represent tens and ones
  • Understanding the equal sign represents equivalency

Learning Objectives

  • Students will be able to add 10 to a given number within 20.
  • Students will be able to subtract 10 from a given number within 20.
  • Students will be able to use base ten blocks to model addition and subtraction problems.
  • Students will be able to identify whether an addition or subtraction equation is true or false.
  • Students will be able to apply place value understanding to solve addition and subtraction problems involving 10.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students what they already know about adding and subtracting. Show the 'Adding and Subtracting with 10 - 1st Grade | Math | Kids Academy' video. Tell students they will be learning how to use different strategies to check their work.
  • T-Chart Explanation (7 mins)
    Explain how to use a T-chart to separate tens and ones. Walk through the first example in the video (17 - 10 = 9) using the T-chart method. Emphasize the importance of aligning the numbers correctly in the tens and ones columns. Have students create their own T-charts on whiteboards or paper.
  • Base Ten Blocks Explanation (7 mins)
    Explain how base ten blocks represent tens and ones. Show how to model the first example (17 - 10 = 9) using base ten blocks. Have students use drawings of base ten blocks to model the problem. Discuss how crossing out a 'ten' block represents subtracting 10.
  • Balloon Math Practice (10 mins)
    Work through the remaining balloon problems in the video, pausing after each one. Have students solve each problem independently using either the T-chart or base ten block method (or both!). Discuss the correct answer and the strategy used to arrive at it. Ask students to explain their reasoning.
  • Wrap Up (6 mins)
    Review the key concepts covered in the video. Ask students to share which method (T-chart or base ten blocks) they prefer and why. Briefly introduce the concept of number lines as another tool for adding and subtracting.

Interactive Exercises

  • Balloon Math Worksheet
    Provide students with a worksheet containing similar addition and subtraction problems involving tens. Have them solve the problems using either the T-chart or base ten block method. Encourage them to check their answers using the opposite method.
  • Number Line Addition and Subtraction
    Draw a number line on the board. Practice adding and subtracting 10 by hopping along the number line. Have students come up to the board to demonstrate adding and subtracting 10 from different starting points.

Discussion Questions

  • What happens when you add 10 to a number?
  • What happens when you subtract 10 from a number?
  • Why is it important to check your answers when doing math problems?
  • Can you think of a time when you might need to add or subtract 10 in real life?

Skills Developed

  • Addition
  • Subtraction
  • Place Value Understanding
  • Problem-Solving
  • Critical Thinking
  • Visual Representation of Math Concepts

Multiple Choice Questions

Question 1:

What is 5 + 10?

Correct Answer: 15

Question 2:

What is 12 - 10?

Correct Answer: 2

Question 3:

Which of these shows one group of ten?

Correct Answer: OOOOOOOOOO

Question 4:

What is 10 + 10?

Correct Answer: 20

Question 5:

If you have 14 balloons and 10 fly away, how many are left?

Correct Answer: 4

Question 6:

Which equation is true?

Correct Answer: 5 + 10 = 15

Question 7:

How many ones are in the number 19?

Correct Answer: 9

Question 8:

What does the equal sign (=) mean?

Correct Answer: The same as

Question 9:

Which is bigger, 10 or 1?

Correct Answer: 10

Question 10:

What is 10 less than 16?

Correct Answer: 6

Fill in the Blank Questions

Question 1:

10 + 3 = _______

Correct Answer: 13

Question 2:

18 - 10 = _______

Correct Answer: 8

Question 3:

A group of ten ones is called a _______.

Correct Answer: ten

Question 4:

10 + _______ = 17

Correct Answer: 7

Question 5:

_______ - 10 = 0

Correct Answer: 10

Question 6:

We can use _______ _______ _______ to help us add and subtract tens.

Correct Answer: base ten blocks

Question 7:

11 has one group of ten and _____ one.

Correct Answer: 1

Question 8:

Adding means putting numbers _______.

Correct Answer: together

Question 9:

Subtracting means _______ _______ from a number.

Correct Answer: taking away

Question 10:

In the number 15, the 1 stands for _______.

Correct Answer: ten

Educational Standards

1.NBT.C.5:Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. 1.OA.C.6:Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). CCSS.Math.Content.1.OA.D.7:Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

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