ALEX Learning Activity Resources

   View Standards     Standard(s): [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) 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).

This activity is a task designed to introduce addition with three addends. The students use counters to represent the problem and begin developing an understanding of the commutative and associative properties of addition.

   View Standards     Standard(s): [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) 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).

This activity is intended to be used as an assessment of students' ability to solve problems with three addends. The assessment includes a word problem and a performance task. The problems provide an opportunity for students to demonstrate an understanding of the properties of addition.