Unit 3: Multi-Digit
Addition and Subtraction
Parent Resources
Grade 3 Unit 3 Overview An overview of Unit 3 to share with families. (PDF document)
Apps
Number Line App Number Line helps students visualize number sequences and model strategies for addition, subtraction, multiplication, and division. It can be used to represent sequences of numbers, including whole numbers and multiples of a variety of numbers. Available as an app for the iPad or as an online web app.
Free Online Manipulatives
Number Pieces & Number Pieces Basic With this virtual version of Number Pieces, students can represent larger numbers and multiplication and division concepts. Number Pieces Basic is a simplified version for use with primary students. Available for iPads or online.
Books
The link below will direct you to books that can be purchased at amazon. These were added with the intention of providing a list of appropriate books that they could check out from our local library. This link was chosen because you can preview the books and see what the cover looks like so it will be easier to find at the library.
Great Estimations Colorful photos depict strategies for estimating a variety of objects. View multiple collections of 10, 100, and 1000. Also see the book Greater Estimations for more strategies.
Apps
Number Line App Number Line helps students visualize number sequences and model strategies for addition, subtraction, multiplication, and division. It can be used to represent sequences of numbers, including whole numbers and multiples of a variety of numbers. Available as an app for the iPad or as an online web app.
Free Online Manipulatives
Number Pieces & Number Pieces Basic With this virtual version of Number Pieces, students can represent larger numbers and multiplication and division concepts. Number Pieces Basic is a simplified version for use with primary students. Available for iPads or online.
Books
The link below will direct you to books that can be purchased at amazon. These were added with the intention of providing a list of appropriate books that they could check out from our local library. This link was chosen because you can preview the books and see what the cover looks like so it will be easier to find at the library.
Great Estimations Colorful photos depict strategies for estimating a variety of objects. View multiple collections of 10, 100, and 1000. Also see the book Greater Estimations for more strategies.
Games for Kids
Dartboard Rounding View a dartboard and click to reveal numbers rounded to the nearest 10, 100, or 1000. In an alternate version, players may input their own answers. Use as a whiteboard resource in a whole class activity or invite students to play independently.
Glowla's Estimation Contraption Mentally round and add numbers and type in the answer. Round numbers to the tens place in the first level and progress to larger numbers.
Home Run Derby Math Estimate your answer, click "done" and then "hit." Game may be played with addition, subtraction, or multiplication problems and emphasizes skills in rounding numbers. View an instructional video here.
ICT Numberline Games Site features a variety of number line games.
Match Around 10s Click on two cards, trying to find a two-digit number and a representation of that number rounded to the nearest 10. Find additional rounding games on Math Nook.
Math Balloons Rounding View a rounding problem (example: 73 Rounds to 80) and click on True or False. Correct answers pop the balloons. Find additional rounding games on Math Nook.
Who Wants to Be a Mathionaire? Read the rounding question and click on the correct answer in this rounding version of Who Wants to Be a Mathionaire?
Count on Convict Players must type in each jump on the "number line" (a convict's escape tunnel) and then add them all together to find the difference between two double-digit numbers.
Match Around 10s Click on two cards, trying to find a two-digit number and a representation of that number rounded to the nearest 10. Find additional rounding games on Math Nook.
Math Balloons Rounding View a rounding problem (example: 73 Rounds to 80) and click on True or False. Correct answers pop the balloons. Find additional rounding games on Math Nook.
Place the Penguin Place penguins on unit & ten charts to represent expanded form of a given number. Level 1 = units & tens. Level 2 = units, tens, hundreds.
Number Pyramid Help Molly through the pyramid doors by completing addition and subtraction equations with the correct number or symbol. "Really hard" level uses 3 digit addition and subtraction.
Ghost Blasters III Two player game in which students take turns clicking on the answer to two-digit plus two-digit addition problems.
*Adapted from Bridges in Mathematics, The Math Learning Center Salem, Oregon by Danielle Baumgart Chippewa Valley Schools, 2015
Glowla's Estimation Contraption Mentally round and add numbers and type in the answer. Round numbers to the tens place in the first level and progress to larger numbers.
Home Run Derby Math Estimate your answer, click "done" and then "hit." Game may be played with addition, subtraction, or multiplication problems and emphasizes skills in rounding numbers. View an instructional video here.
ICT Numberline Games Site features a variety of number line games.
Match Around 10s Click on two cards, trying to find a two-digit number and a representation of that number rounded to the nearest 10. Find additional rounding games on Math Nook.
Math Balloons Rounding View a rounding problem (example: 73 Rounds to 80) and click on True or False. Correct answers pop the balloons. Find additional rounding games on Math Nook.
Who Wants to Be a Mathionaire? Read the rounding question and click on the correct answer in this rounding version of Who Wants to Be a Mathionaire?
Count on Convict Players must type in each jump on the "number line" (a convict's escape tunnel) and then add them all together to find the difference between two double-digit numbers.
Match Around 10s Click on two cards, trying to find a two-digit number and a representation of that number rounded to the nearest 10. Find additional rounding games on Math Nook.
Math Balloons Rounding View a rounding problem (example: 73 Rounds to 80) and click on True or False. Correct answers pop the balloons. Find additional rounding games on Math Nook.
Place the Penguin Place penguins on unit & ten charts to represent expanded form of a given number. Level 1 = units & tens. Level 2 = units, tens, hundreds.
Number Pyramid Help Molly through the pyramid doors by completing addition and subtraction equations with the correct number or symbol. "Really hard" level uses 3 digit addition and subtraction.
Ghost Blasters III Two player game in which students take turns clicking on the answer to two-digit plus two-digit addition problems.
*Adapted from Bridges in Mathematics, The Math Learning Center Salem, Oregon by Danielle Baumgart Chippewa Valley Schools, 2015