ALEX Resources

Narrow Results:
Lesson Plans (1) A detailed description of the instruction for teaching one or more concepts or skills. Learning Activities (1) Building blocks of a lesson plan that include before, during, and after strategies to actively engage students in learning a concept or skill. Classroom Resources (2)

ALEX Lesson Plans  
   View Standards     Standard(s): [MA2019] (1) 3 :
3. Apply properties of operations as strategies to add and subtract.

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 and third numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12 (associative property of addition).
When adding 0 to a number, the result is the same number (identity property of zero for addition).
[MA2019] (1) 4 :
4. Explain subtraction as an unknown-addend problem.

Example: subtracting 10 - 8 by finding the number that makes 10 when added to 8
[MA2019] (1) 5 :
5. Relate counting to addition and subtraction.

Example: counting on 2 to add 2
[MA2019] (1) 8 :
8. Solve for the unknown whole number in various positions in an addition or subtraction equation, relating three whole numbers that would make it true.

Example: determining the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? - 3, and 6 + 6 = ?
Subject: Mathematics (1)
Title: Where Oh Where Has My Addend Gone?
Description:

Students will use number bonds and counters as a strategy for finding the missing addend. Students will become aware of the relationship between addition and subtraction. They will also use counting as it is related to addition and subtraction.

This is a College- and Career-Ready Standards showcase lesson plan.



ALEX Learning Activities  
   View Standards     Standard(s): [MA2019] (1) 8 :
8. Solve for the unknown whole number in various positions in an addition or subtraction equation, relating three whole numbers that would make it true.

Example: determining the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? - 3, and 6 + 6 = ?
[MA2019] (1) 4 :
4. Explain subtraction as an unknown-addend problem.

Example: subtracting 10 - 8 by finding the number that makes 10 when added to 8
[MA2019] (1) 2 :
2. Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 by using concrete objects, drawings, or equations with a symbol for the unknown number to represent the problem.
[MA2019] (1) 1 :
1. Use addition and subtraction to solve word problems within 20 by using concrete objects, drawings, and equations with a symbol for the unknown number to represent the problem.

a. Add to with change unknown to solve word problems within 20.

b. Take from with change unknown to solve word problems within 20.

c. Put together/take apart with addend unknown to solve word problems within 20.

d. Compare quantities, with difference unknown, bigger unknown, and smaller unknown while solving word problems within 20.
Subject: Mathematics (1)
Title: Making a Difference Solving Word Problems
Description:

This learning activity will provide online practice with solving word problems involving situations of adding to, taking from, taking apart, and comparing with unknowns in all positions. The students will use strategies they learned to solve the problems presented to them in this engaging online game. This is a helpful tool to measure the students' application of skills.

This activity results from the ALEX Resource Development Summit.



ALEX Learning Activities: 1

Go To Top of page
ALEX Classroom Resources  
   View Standards     Standard(s): [MA2019] (1) 4 :
4. Explain subtraction as an unknown-addend problem.

Example: subtracting 10 - 8 by finding the number that makes 10 when added to 8
Subject: Mathematics (1)
Title: How to Feed the Hamster: The Odd Squad
URL: https://aptv.pbslearningmedia.org/resource/0b75b18b-1733-4e03-8a97-2d5c9c6c2ee9/how-to-feed-the-hamster-odd-squad/
Description:
Oscar needs to calculate the value of an unknown addend in a subtraction formula in order to feed the Odd Squad hamster. This video clip helps students understand the relationship between addition and subtraction.

   View Standards     Standard(s): [MA2019] (1) 4 :
4. Explain subtraction as an unknown-addend problem.

Example: subtracting 10 - 8 by finding the number that makes 10 when added to 8
Subject: Mathematics (1)
Title: It's Picture Day! The Odd Squad
URL: https://aptv.pbslearningmedia.org/resource/20d7acd2-5b1c-4006-9b05-b8f2bc74e7c4/its-picture-day-odd-squad/
Description:

It's Picture Day at Odd Squad, and Otto needs to use an equation to calculate how long he needs to wait in line. Otto will learn to solve subttaction problems by finding the missing addend.


ALEX Classroom Resources: 2

Go To Top of page