Unit 3: Multi-Digit Addition & Subtraction

Parent Letter Unit 3.pdf

Home Connections Supports and Resources:

Addition and subtraction strategies from Unit 1 are still being practiced in this unit. The standard algorithm is also formally introduced.

Place Value

Below are the resources to support students' understandings of place value. This skill will help them when rounding or using the standard algorithm.


  • PLACE VALUE ANCHOR CHART- (This anchor chart displays the place values for numbers through the millions and the different ways to represent numbers)


Rounding

Below are the resources to support students with rounding to the nearest ten and hundred.

Home Connection Pages:

43, 44, 45, 46, 47, 48, 53, 54, 59, 60

Addition Standard Algorithm

Below are the resources to support students with adding using the standard algorithm.

Home Connections Pages:

48, 50, 52, 54, 55, 57, 59, 60
  • ADDITION ANCHOR CHART- (This anchor chart provides an example with labeled steps for solving an addition equation using the standard algorithm.)

  • ADDITION USING THE STANDARD ALGORITHM FLIPPED VIDEO- ( This flipped video explains how to use the standard, or stacking, algorithm when adding multi-digit numbers. The video models regrouping and checking for reasonableness with estimation. )


Subtraction Standard Algorithm

Below are the resources to support students with subtracting using the standard algorithm.

Home Connections Pages:

51, 52, 58, 59, 60
  • SUBTRACTION ANCHOR CHART- (This anchor chart provides an example with labeled steps for solving a subtraction equation using the standard algorithm.)

  • SUBTRACTING USING THE STANDARD ALGORITHM- (This flipped video explains how to use the standard, or stacking, algorithm when subtracting multi-digit numbers. This video models regrouping.)


Addition & Subtraction Story Problems

Below are resources to assist students in solving multi-step story problems.

  • MULTI-STEP STORY PROBLEM ANCHOR CHART- ( This anchor chart provides helpful steps for students to use while solving story problems with more than one step.)

  • KEY WORDS CHART- (This chart provides key words that signify operations when solving story problems.)

  • "CUBES"- (This resources provides coding strategies to help student in identifying essential information in story problems.)

Anchor Charts

Click through the images to see the anchor charts for this unit.

Flipped Videos

Click to watch the flipped videos explaining how to use the strategies worked on this unit

Subtraction Standard Algorithm Regrouping.mp4

Subtraction Standard Algorithm Regrouping

Rounding to 100s.mp4

Rounding to 100s

Addition Standard Algorithm.mp4

Addition Standard Algorithm

Rounding to 10s.mp4

Rounding to 10s

Subtraction Standard Algorithm No Regrouping.mp4

Subtraction Standard Algorithm

No Regrouping

Estimated Sums.mp4

Estimating Sums

Games for Extra Practice:

Click on pictures to play these math games for extra practice!

See how many addition and subtraction problems you can get right. God for finding missing numbers in sums

Okta challenges you to a duel! That crazy octopus wants to play you in a game where the first person to choose cards with a specified sum wins. You can choose how many cards, what types of numbers, and Okta's level of strategy.

See how many shots you can make in the time limit! A missing addend/subtrahend/factor arcade basketball game.

Alien Addition is a math game that helps students with learning addition using an alien invasion theme. Invading spaceships with addition problems move down from the top of the screen toward a laser cannon on a platform at the bottom.

Glowla has created this weird machine just for you to play with! Here's the deal: The machine will show you a bunch of numbers. You need to type in an estimate of what those numbers would add up to.

This is a match 3 game with a mathematical twist. Your goal is complete each level by changing all gray tiles to yellow. Each balloon has a statement in it about rounding numbers. Determine if the statement is true or false.