ALEX Learning Activity Resources

   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.

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.

   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) 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) 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.

This learning activity will guide students through solving story problems. It will help the students unpack simple word problems with unknowns in all positions.  The students will use different strategies to solve problems. It will encourage the students to make sense of problems. This learning activity will engage the students so that they will feel confident in solving a variety of story problems.

This activity results from the ALEX Resource Development Summit.

   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) 6 :

6. Add and subtract within 20.

a. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by counting on.

b. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by making ten.

c. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by decomposing a number leading to a ten.

Example: 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9

d. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by using the relationship between addition and subtraction.

Example: Knowing that 8 + 4 = 12, one knows 12 - 8 = 4.

e. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by creating equivalent but easier or known sums.

Example: adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13

This learning activity will provide online practice with composing and decomposing numbers. The students will use strategies learned to determine the unknown whole number in an addition or subtraction equation relating three whole numbers. This is a helpful tool to measure the students' application of skills and help build number sense and increase fluency.

This activity results from the ALEX Resource Development Summit.

   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) 6 :

6. Add and subtract within 20.

a. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by counting on.

b. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by making ten.

c. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by decomposing a number leading to a ten.

Example: 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9

d. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by using the relationship between addition and subtraction.

Example: Knowing that 8 + 4 = 12, one knows 12 - 8 = 4.

e. Demonstrate fluency with addition and subtraction facts with sums or differences to 10 by creating equivalent but easier or known sums.

Example: adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13

This learning activity is a fun and interactive game. It will develop number sense by composing and decomposing numbers as well as building a foundation for place value skills. It can be used in whole group and small group instruction.  Before this game, the students will need to know strategies for making numbers in different ways. After the students are comfortable with this game, it can be varied by playing it with breaking into three parts. Students will have the opportunity to use several of the mathematical practices. This task allows the teacher to assess students' mathematical understanding.

This activity results from the ALEX Resource Development Summit.