## Grade 1 Subtraction

**My Own Legend:**

**Red: What I have guessed is a little easier than grade level.**

******Please note this is only my interpretation!**

**Yellow: Alberta curriculum Specific Learning Expectation (SLE)**

******Please check original curriculum as I cannot guarantee accuracy!**

******The SLE’s are in my own order, NOT the same order as the curriculum.**

**Green: What I have guessed is a little more difficult than grade level.**

******Please note that this is only my interpretation!**

**Identify the number, up to 20, that is:**

**• one less**

**• two less**

**than a given number.**

Name the number that is one less than a given number, up to 20.

Name the number that is one less or two less than a given number, up to 20.

Name the number that is 3 less than a given number, up to 20.

http://www.aaaknow.com/g1_k5dx1.htm

subtracting 1 from 20 backwards

Represent a number on a ten frame that is one less or two less than a given number.

**Demonstrate an understanding of subtraction of numbers with answers to 20, concretely, pictorially and symbolically**

**, by:**

**• using familiar mathematical language to describe subtractive actions**

**• creating and solving problems in context that involve subtraction**

**• modelling subtraction, using a variety of concrete and visual representations, and recording the process symbolically.**

Use and describe a personal strategy for determining a given difference.

http://www.dositey.com/2008/addsub/Mystery4.htm

Find out the picture behind the tiles by solving subtraction questions within 0-10.

http://www.ictgames.com/save_the_whale_v4.html

use pipe lengths to make 10

http://www.thegreatmartinicompany.com/Math-Quick-Quiz/subtraction-kid-quiz.html

Five problems to solve online. You can choose the highest number used from the list of numbers below the quiz.

http://illuminations.nctm.org/activitydetail.aspx?id=75

excellent online game using 10 frames to go from very beginner ideas in addition to more difficult

http://www.abc.net.au/countusin/games/game8.htm

Subtract two numbers which bowls a ball down a bowling alley lane.

http://www.primarygames.com/takeaway/start.htm

http://www.playkidsgames.com/games/pinball/subtraction/defaultk1.htm

When the ball hits numbers, it defines a problem. Next you choose the correct answer.

http://www.toonuniversity.com/flash.asp?err=513&engine=12

Help the duck fly faster by clicking on the cloud with the correct answer.

http://www.playkidsgames.com/games/apples/savetheApples.htm

Click on the correct basket to get the monkey to carry the apple basket. A crocodile is waiting!

http://www.hbschool.com/activity/busy_bees/index.html

Figure out how many of the 10 bees went inside the hive.

**http://www.ictgames.com/soccer_subtraction.html**

Click to make the players disappear until the subtraction sentence is true.

http://www.softschools.com/math/subtraction/

youtube: Add means put together, subtract means take away

united streaming videos:

Mathematics for Primary Subtraction

**Subtracting up to 10:**

**http://www.toytheater.com/subtraction-sled.php**

how many more children to fill up 10 sleds game

http://www.professorgarfield.org/pgf_kbkids.html

look under Kindergarten Math: Subtraction in the Bayou for game