# ALEX Learning Activity

## Solving Word Problems Within 1,000

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

You may save this Learning Activity to your hard drive as an .html file by selecting “File”,then “Save As” from your browser’s pull down menu. The file name extension must be .html.
This learning activity provided by:
 Author: Jennifer Towles System: College/University School: University of Montevallo
General Activity Information
 Activity ID: 2667 Title: Solving Word Problems Within 1,000 Digital Tool/Resource: Solving Word Problems Within 1,000 Google Slides Presentation Web Address – URL: https://docs.google.com/presentation/d/19wYOtzAdEnUP-_7ryZwsSdbgi7XlprvFiCyWlDtY41s/edit?usp=sharing Overview: This activity requires students to solve a subtraction problem within 1,000, then show their computation strategy on a number line. The activity includes a parallel task. The parallel task uses the same word problem with different number magnitudes (within 1,000, within 100, and within 25). The students will be allowed to choose the word problem with the magnitude level with which they are most comfortable.This activity was created as a result of the ALEX Resource Development Summit.
Associated Standards and Objectives
Content Standard(s):
 Mathematics MA2019 (2019) Grade: 2 12. Add and subtract within 1000 using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. a. Explain that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds. Unpacked Content Evidence Of Student Attainment:Students: add and subtract within 1000. explain their reasoning using concrete models or drawings, or using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. relate the strategy used to a written method (symbolic and numeric recording of the steps used).Teacher Vocabulary:Compose Decompose Knowledge:Students know: how to count to 1,000. how to identify hundreds, tens, and ones. how to compose numbers. how to decompose two digit numbers. how to record strategies for solving addition and subtraction problems. Skills:Students are able to: add and subtract within 1000. model addition problems using visual models. record strategies for solving addition problems. communicate the relationship between models and symbolic (numeric) representations.Understanding:Students understand that: relationships between models of addition/subtraction problems and written strategies of those models can be used to justify solutions.Diverse Learning Needs: Essential Skills:Learning Objectives: M.2.12.1: Define regrouping, total, sum, difference and solve. M.2.12.2: Add and subtract two two-digit numbers with and without regrouping. M.2.12.3: Determine the value of the number in the ones, tens, hundreds and thousands place using concrete models or drawings and strategies based on place value. M.2.12.4: Match the number in the ones, tens, hundreds and thousands position to a pictorial representation or manipulative of the value. M.2.12.5: Model written method for recording horizontal and vertical addition and subtraction problems. M.2.12.6: Represent two- and three-digit numbers with multiple models. Examples: models—base ten blocks, number lines, linking cubes, straw bundles. M.2.12.7: Recall single-digit addition and subtraction facts. M.2.12.8: Add and subtract within 20, e.g., by using objects or drawings to represent the problem. Prior Knowledge Skills:Notice same/different and some/all. Recognize numerals from 1-50. Add one to a set of objects (up to 10 objects). Given small groups of objects, create larger groups by combining the small groups. Understand ten and 1 (ten 1's =10). Put together two small groups of objects to create a larger group. Subtract one from a set of objects (up to 10 objects). Given a group of objects (20 or less), divide the group into smaller groups in various ways. Take away objects from a large group to create two smaller groups. Understand number words. Establish one-to-one correspondence between numbers and objects when given a picture a drawing or objects. Rote count to 10. Understand amount words, such as more, less, and another. Begin to understand that parts of an object can make a whole. Alabama Alternate Achievement Standards AAS Standard: M.AAS.2.10 Using vocalization, sign language, augmentative communication, or assistive technology, identify the meaning of the + sign (add, plus, put together) and the sign (subtract, take away, take from) and the = sign (equal, the same as); compose and decompose numbers up to 20 using objects, pictures, drawings, or numbers.
Learning Objectives:

The student will make sense of a problem and persevere to solve it.

The student will use strategies based on place value, properties of operation, and the relationship between addition and subtraction to add or subtract within 1,000

The student will record their strategy on a number line drawing.

Strategies, Preparations and Variations