Math Fact Fun: Mastering the Last Eight!

Math Grades 1st Grade 13:26 Video
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Lesson Description

Let's conquer the final eight addition facts! This lesson will help you memorize AND understand these math facts using fun strategies and activities.

Video Resource

Grade 1: Saxon Math Lesson #116 Addition Facts - The Last Eight Facts

The Eagle's Nest - Our Online Classroom

Duration: 13:26
Watch on YouTube

Key Concepts

  • Addition facts (specifically: 5+3, 6+3, 7+4, 7+5, 8+3, 8+4, 8+5, 8+6)
  • Memorization strategies for addition facts
  • Understanding the meaning of addition
  • Using manipulatives (cubes, blocks) to visualize addition
  • Commutative property of addition ('switcheroo' facts)

Learning Objectives

  • Students will be able to recall the answers to the eight targeted addition facts.
  • Students will be able to use manipulatives to solve addition problems.
  • Students will be able to identify and apply the commutative property of addition.

Educator Instructions

  • Introduction (5 mins)
    Begin by welcoming students and explaining that today they will be learning the last eight addition facts. Emphasize how far they've come and how close they are to mastering all their facts!
  • Video Viewing (10 mins)
    Play the video 'Grade 1: Saxon Math Lesson #116 Addition Facts - The Last Eight Facts.' Encourage students to pay close attention to the facts, the strategies presented, and the manipulatives used.
  • Fact Review and Memorization (10 mins)
    Write the eight addition facts on the board: 5+3, 6+3, 7+4, 7+5, 8+3, 8+4, 8+5, and 8+6. Review each fact aloud as a class. Discuss memorization techniques (flashcards, repetition, songs).
  • Manipulative Practice (10 mins)
    Provide students with linking cubes or other small manipulatives. Have them use the manipulatives to represent each addition fact and find the answer. Encourage counting on as a strategy. Example: for 7+4, start with 7 cubes and then add 4 more while counting '8, 9, 10, 11'.
  • "Switcheroo" Activity (5 mins)
    Write out the switcheroo facts alongside the originals (3+5, 3+6, 4+7, 5+7, 3+8, 4+8, 5+8, 6+8). Discuss that the order of the numbers doesn't change the answer. Have students use manipulatives to prove this.
  • Game Time! (5 mins)
    Play a quick game to reinforce the facts. For example, call out one of the addition facts and have students quickly shout out the answer.

Interactive Exercises

  • Cube Creations
    Students use linking cubes to build and solve each of the eight addition facts. They can then draw a picture of their cube creation and write the equation below it.
  • Fact Flashcards
    Students create flashcards for each of the eight addition facts. On one side, they write the equation (e.g., 5+3). On the other side, they write the answer (e.g., 8). They can then use these flashcards to practice memorizing the facts.

Discussion Questions

  • Why is it important to learn our addition facts?
  • What is your favorite strategy for remembering math facts?
  • Can you think of another 'switcheroo' addition fact?

Skills Developed

  • Addition fluency
  • Problem-solving
  • Visual representation of mathematical concepts
  • Memorization

Multiple Choice Questions

Question 1:

What is 5 + 3?

Correct Answer: 8

Question 2:

What is 6 + 3?

Correct Answer: 9

Question 3:

What is 7 + 4?

Correct Answer: 11

Question 4:

What is 8 + 3?

Correct Answer: 11

Question 5:

What is 7 + 5?

Correct Answer: 12

Question 6:

What is 8 + 4?

Correct Answer: 12

Question 7:

What is 8 + 5?

Correct Answer: 13

Question 8:

What is 8 + 6?

Correct Answer: 14

Question 9:

If 5 + 3 = 8, what is 3 + 5?

Correct Answer: 8

Question 10:

Which of these helps you solve math problems?

Correct Answer: All of the above

Fill in the Blank Questions

Question 1:

5 + 3 = ____

Correct Answer: 8

Question 2:

6 + 3 = ____

Correct Answer: 9

Question 3:

7 + 4 = ____

Correct Answer: 11

Question 4:

7 + 5 = ____

Correct Answer: 12

Question 5:

8 + 3 = ____

Correct Answer: 11

Question 6:

8 + 4 = ____

Correct Answer: 12

Question 7:

8 + 5 = ____

Correct Answer: 13

Question 8:

8 + 6 = ____

Correct Answer: 14

Question 9:

3 + 6 = ____

Correct Answer: 9

Question 10:

We can use _____ to help us solve math problems.

Correct Answer: cubes

Educational Standards

CCSS.Math.Content.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.B.3:Apply properties of operations as strategies to add and subtract. (Students need not use formal terms for these properties.) Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.) 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.

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