Subtraction Superstars: Taking Away Fun!

Math Grades 1st Grade 3:59 Video
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Lesson Description

Learn how to subtract numbers under 20 using blocks, toys, and your smart brain! We'll explore taking away and how it's the opposite of adding.

Video Resource

How to Subtract

Miacademy Learning Channel

Duration: 3:59
Watch on YouTube

Key Concepts

  • Subtraction is taking away.
  • Subtraction is the opposite of addition.
  • Numbers can be broken down into tens and ones to make subtraction easier.

Learning Objectives

  • Students will be able to subtract numbers under 20 using objects and drawings.
  • Students will be able to explain that subtraction means 'taking away'.
  • Students will be able to check their subtraction by adding.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students what 'taking away' means. Show a few small objects (like crayons) and physically take some away, asking how many are left. Introduce the concept of subtraction as taking away and that is the opposite of addition.
  • Watch the Video (7 mins)
    Play the 'How to Subtract' video from Miacademy Learning Channel. Encourage students to pay attention to how the video uses blocks and other objects to show subtraction.
  • Practice with Objects (10 mins)
    Provide each student with a set of small objects (beans, blocks, counters). Call out subtraction problems (e.g., 'Start with 7 beans, take away 2. How many are left?'). Have students physically perform the subtraction with their objects and write down the equation.
  • Tens and Ones Subtraction (10 mins)
    Work through subtraction problems like 13 - 2 and 11 - 4, as shown in the video. Use base-ten blocks (or drawings) to visualize the tens and ones. Guide students to understand how they can subtract from the 'ones' place first, and when they need to, take from the 'ten' place.
  • Wrap Up and Check (3 mins)
    Review the key concepts of subtraction. Ask students to give examples of when they use subtraction in their daily lives (e.g., sharing toys, eating snacks).

Interactive Exercises

  • Subtraction Story Problems
    Create simple subtraction story problems (e.g., 'Maria had 8 cookies and gave 3 to her friend. How many cookies does Maria have left?'). Have students solve the problems using drawings or objects.
  • Subtraction Flashcards
    Use flashcards with subtraction problems within 20. Have students answer the problems quickly to build fluency.

Discussion Questions

  • What does it mean to subtract?
  • How is subtraction different from addition?
  • Can you think of a time when you used subtraction today?

Skills Developed

  • Subtraction skills
  • Problem-solving skills
  • Visual representation of math concepts

Multiple Choice Questions

Question 1:

Subtraction means to:

Correct Answer: Take away

Question 2:

What is 5 - 2?

Correct Answer: 3

Question 3:

Which is the subtraction problem?

Correct Answer: 7 - 3 = 4

Question 4:

If you have 10 candies and you eat 4, how many candies do you have left?

Correct Answer: 6

Question 5:

What is 12 - 0?

Correct Answer: 12

Question 6:

Which number is missing? 9 - ___ = 5

Correct Answer: 4

Question 7:

Sara has 6 apples and gives 1 to Tom. How many does Sara have?

Correct Answer: 5

Question 8:

What is 15 - 5?

Correct Answer: 10

Question 9:

Which is the same as taking away?

Correct Answer: Subtraction

Question 10:

If you have 11 cookies and eat 2, how many are left?

Correct Answer: 9

Fill in the Blank Questions

Question 1:

Subtraction is the opposite of ___________.

Correct Answer: addition

Question 2:

When you subtract, you __________ things away.

Correct Answer: take

Question 3:

7 - 4 = _______

Correct Answer: 3

Question 4:

10 - 5 = ________

Correct Answer: 5

Question 5:

If you have 8 balls and lose 2, you have _______ balls left.

Correct Answer: 6

Question 6:

12 - 6 = ________

Correct Answer: 6

Question 7:

You can use ___________ to help you subtract.

Correct Answer: objects

Question 8:

15 - 3 = _______

Correct Answer: 12

Question 9:

If you have 9 toys and give away 3, you have __________ toys left.

Correct Answer: 6

Question 10:

20 - 10 = _________

Correct Answer: 10

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.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.NBT.B.2.B:The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.

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