Author:
DAWNE COKER
Subject:
Mathematics
Material Type:
Activity/Lab, Assessment, Formative Assessment
Level:
Lower Primary
Tags:
  • 1000
  • 2-digit
  • Add
  • Addition
  • Base
  • CL5Assessment
  • Cluster 5
  • Flexibly
  • Fluency
  • Place
  • Strategies
  • Ten
  • Three
  • Two Digit
  • Unit 5
  • Value
  • Within
  • License:
    Creative Commons Attribution
    Language:
    English
    Media Formats:
    Downloadable docs

    Education Standards

    T4T Add Three 2-Digit Numbers (NBT.6)

    T4T Add Three 2-Digit Numbers (NBT.6)

    Overview

    This resource is from Tools4NCTeachers. 

    This file contains a set of 2 tasks (including scoring rubric and student recording sheet).  The tasks may be used for instruction or assessment. 

    Remix this resource to include student work samples or addtional tasks.

    Here is a sample of this resource. Click the attachments to download the fully-formatted collection of assessments and support materials.

     

    NC.2.NBT.6

    Adding Three 2-digit Numbers

    Domain

    Number and Operations in Base Ten

    Cluster 5

    Adding and Subtracting within 1000

    Standard(s)

    NC.2.NBT.6  Add up to three, two-digit numbers using strategies based on place value and properties of operations.

    Materials

    task sheet, pencil, base ten blocks, snap-cubes or Unifix cubes, hundred charts

    Task

    Read the problem to the students:

    • A second-grade class was collecting canned food for the Thanksgiving Canned Food Drive.  On Monday 38 cans were brought in.  On Tuesday 54 cans were collected.  On Wednesday they collected 72 cans. 

    How many cans did the second-grade class bring in?

    • Solve the problem. Use pictures, words, or numbers to represent your strategy.

     

    Continuum of Understanding

    Not Yet Proficient

    • Needs prerequisite skills- Understand that the two digits of a two-digit number represent amounts of tens and ones (NC.1.NBT.2).  Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones (NC.2.NBT,1).
    • Unitize by making a hundred from a collection of ten tens.
    • Compose and decompose numbers using various groupings of hundreds, tens, and ones.

    Checklist for teacher to identify mastery of standard:

    • Clear explanation of strategy.
      • break apart
      • snap cubes
      • base 10 blocks,
      • hundred boards
    • Adds correctly to find the sum of 164

    Progressing

    • Gives the correct answer of 164, but is unable to show work using a strategy.
    • Gives an incorrect answer, but work could lead to correct answer.

    Meets Expectation

    • Gives the correct answer of 164.
    • Uses pictures, words or numbers to represent the strategy.

     

     

     

    Standards for Mathematical Practice

    1.  Make sense and persevere in solving problems.

    2.  Reason abstractly and quantitatively.

    3.  Construct viable arguments and critique the reasoning of others.

    4.  Model with mathematics.

    5.  Use appropriate tools strategically.

    6.  Attend to precision.

    7.  Look for and make use of structure.

    8.  Look for and express regularity in repeated reasoning.

     

     

    A second-grade class was collecting cans of food for the Thanksgiving Canned Food Drive.  On Monday 38 cans were brought in.  On Tuesday 54 cans were collected.  On Wednesday they collected 72 cans.  How many cans did the second-grade class bring in?

    Solve the problem.

    Use pictures, words, or number to represent your strategy.

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    _____________ cans