# ALEX Learning Activity

## Making a Difference Solving Word Problems

A Learning Activity is a strategy a teacher chooses to actively engage students in learning a concept or skill using a digital tool/resource.

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This learning activity provided by:
 Author: Kimberly Henderson System: Elmore County School: Wetumpka Elementary School
General Activity Information
 Activity ID: 2681 Title: Making a Difference Solving Word Problems Digital Tool/Resource: Word Problem Practice Game: "MOLLY ADDS & SUBTRACTS FROM 20" Web Address – URL: https://www.abcya.com/games/first_grade_word_problems_add_subtract Overview: 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.
Associated Standards and Objectives
Content Standard(s):
 Mathematics MA2019 (2019) Grade: 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. Unpacked Content Evidence Of Student Attainment:Students: Use a variety of representations to solve word problems. Justify and explain answers using concrete objects and drawings. Teacher Vocabulary:Change unknown Put together Take apart CompareKnowledge:Students know: addition and subtraction strategies and models. how to form an equation.Skills:Students are able to: represent quantities and operations (addition & subtraction) with concrete objects, pictorially, or symbolically. Use informal and mathematical language to communicate the representations. Accurately compute sums and differences.Understanding:Students understand that: addition is both putting together and adding to. subtraction is taking apart, taking from, and comparisons. Mathematical problems can be solved using a variety of strategies. models, and representations. variables in the form of blanks, boxes, or letters, represent unknown quantities when representing mathematical situations algebraically. Alabama Alternate Achievement Standards AAS Standard: M. AAS.1.1 Represent addition as "add to/put together" and subtraction as "take from/take apart" with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, or verbal explanations (limited to 10). Mathematics MA2019 (2019) Grade: 1 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. Unpacked Content Evidence Of Student Attainment:Students: Compute the sum of three whole numbers using a variety of representations such as concrete objects, drawings, or equations. Explain and justify the answer using the representations. Teacher Vocabulary:Concrete objectsKnowledge:Students know: how to solve for addition by using strategies and understanding the relationship between addition and subtraction.Skills:Students are able to: efficiently apply strategies for solving multiple addend problems. Use symbols to represent unknown quantities in equations. Accurately compute sums.Understanding:Students understand that: more than two quantities can be combined in a problem. Alabama Alternate Achievement Standards AAS Standard: M. AAS.1.1 Represent addition as "add to/put together" and subtraction as "take from/take apart" with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, or verbal explanations (limited to 10). Mathematics MA2019 (2019) Grade: 1 4. Explain subtraction as an unknown-addend problem. Example: subtracting 10 - 8 by finding the number that makes 10 when added to 8 Unpacked Content Evidence Of Student Attainment:Students: Use a pictorial or physical model to explain the connection between subtraction and addition.Teacher Vocabulary:AddendKnowledge:Students know: The relationship between addition and subtraction. how to explain subtraction as an unknown addend.Skills:Students are able to: use symbols such as blanks, boxes, or letters to represent unknown quantities in equations. Communicate the connections between subtraction and addition. Use the inverse relationship between addition and subtraction to find differences. Choose and apply addition and subtraction strategies to accurately determine sums and differences within 20.Understanding:Students understand that: addition and subtraction have an inverse relationship that can be used to solve problems. Alabama Alternate Achievement Standards AAS Standard: M.AAS.1.3 Demonstrate "putting together" two sets of objects to solve the problem. Mathematics MA2019 (2019) Grade: 1 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 = ? Unpacked Content Evidence Of Student Attainment:Students: Solve single operation addition/subtraction equations containing a single unknown.Teacher Vocabulary:EquationKnowledge:Students know: Strategies for solving simple addition or subtraction equations with one unknown.Skills:Students are able to: solve simple addition and subtraction equations. Justify and explain their thinking.Understanding:Students understand that: equalities contain expressions that name the same amount on each side of the equal sign, even with quantities unknown. Alabama Alternate Achievement Standards AAS Standard: M.AAS.1.7 Given three related whole numbers, construct a number sentence that is true, in relation to addition and subtraction.
Learning Objectives:

• The student will use addition and subtraction to solve problems within 20.
• The student will determine the unknown whole number in addition and subtraction equations.
• The student will use strategies to solve a variety of word problems.
Strategies, Preparations and Variations