Adding and Subtracting Mystery
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Subject Area: Mathematics (B.E.S.T.) | Grade Level: 1
Lesson Length: 15 minutes or less
Keywords/Tags: Adding, Subtracting, Addition, Subtraction, Math, First Grade
Lesson Description: In this lesson ,students will be finding the unknown whole number in addition and subtraction math problems.

  • MA.1.AR.2.3 Determine the unknown whole number in an addition or subtraction equation, relating three whole numbers, with the unknown in any position.
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Video : Adding and Subtracting with Missing Numbers
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Description: Students are taught how to find the missing whole number in addition and subtraction equations.
Quiz : Find the Missing Number
Instructions: Please complete this quiz by choosing the correct answer for each question. You can take this quiz as many times needed.
Question #1

5 + ? = 9

Question #2

7 - 2 = ?

Question #3

10 - ? = 10

Question #4

? + 1 = 7

Question #5

9 - ? = 3

Question #6

? - 5 = 2

Question #7

1 + 9 =

Question #8
Does 5 and 3 ADD up to 8?
Question #9
Does 8 MINUS 7 equal 2?
Question #10
5 + 4 = 8
Question #11
6 - 3 = 3
Question #12
What two numbers can you ADD to get the number 4? If you think there are more than 1 way to get the number 4 by adding, then put that too.
Description: Students will find the missing whole number in the math equation.
Resources : Adding and Subtracting with Missing Numbers Videos
Instructions: Look through the resources for more help and practice.
Video 1

Funbrain Adding Game

Video 2