Chapter 3: Addition and Subtraction Facts Within 0-18
The Lessons in Chapter 3
Review: Completing the Next Whole Ten
Review: Going Over Ten
Adding with 9
Adding with 8
Adding with 7
Adding with 6
Review—Facts with 6, 7, and 8
Subtract to Ten
Difference and How Many More
Number Rainbows—11 and 12
Fact Families with 11
Fact Families with 12
Number Rainbows—13 and 14
Fact Families with 13 and 14
Fact Families with 15
Fact Families with 16
Fact Families with 17 and 18
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Video: Strategies for Subtraction Facts
Maria's own video that shows how to use fact families in order to facilitate the learning and memorization of the basic subtraction facts.
Video: Strategies for Addition Facts
Maria's own video which lists several strategies to learn the basic addition facts, including the 9-trick, the 8-trick, the doubles, and doubles plus one more.
Bridging Shuttle
Bridging Through Ten means the same as adding to ten first, then the rest. Get a “flight plan”, then first add to ten by typing the number needed in the oval, and press the red button. Then type the rest that the shuttle needs to go in the other oval, and press the red button.
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Power Lines Puzzle
Arrange the numbers into the pattern so that the numbers on the “lines” add up to the given sum.
Online Addition Flashcards
Catch the Stars
Catch the stars that add up to the number on the bucket. Click on the bucket to change the number. Don't let any of the stars fall away! You have all of the answers in your bucket.
Penguin Party Addition
Feed a fish to the penguin that has the correct answer to the addition problem. Choose level four.
Car Wash Addition
Wash cars while practicing addition facts. Then, participate in a race!
Bugabaloo Shoes
How many shoes do the bugs have? This game practices basic addition facts.
Math Downhill Slalom
Win a gold medal by skiing through and around the correct flags.
Number Line Jump Maker
Illustrate jumps on the number line with this interactive tool.
Digit Drop
Drop the blocks into the empty slots to complete the subtraction sentences. Choose “Subtraction” and the level “Hard”.
Math Lines
Practice adding in this fun game. First, choose which number you want to practice. Then, shoot the numbered marble from the cannon into a numbered marble such that the numbers total the target number.
Number Twins
First, click on the number that you want to practice. Then, match pairs of balls that add up to that number.
Addition Games
Practice addition facts with these fun games!
Subtraction Games
Practice subtraction facts with these fun games!
Left Turn Otto Even and Odd
Help Otto get the even or odd numbers as required on the top of the screen.
Aplus Math Games
Matho (math and bingo combined), concentration, hidden picture, and Planet Blaster games for the basic operations.
Tux Math
A versatile free software for math facts with many options. Includes all operations. You need to shoot falling comets that can damage penguins' igloos.
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