Unit 4, Lesson 21--Addition Algorithms

Lesson 21-- Addition Algorithms

Introduction

Hello Mathematicians! Today we will work on solving addition problems using algorithms.  This is a strategy that uses a step-by-step procedure for solving problems.


Video


Interactive

Part 1 Directions:

  • In the interactive below, use the place value algorithm to solve the addition problem. 
  • Follow the steps. 
  • Drag and drop each digit to the correct place.

Part 2 Directions:

  • Try using the place value or standard algorithm to solve the problems.
  • Show your work in your notebook.  Then check your answer in the interactive.

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