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## Subtracting - CCSS 2.OA.B.2, 2.NBT.B.5

### Links verified on 8/31/2016

1. Exercises and Games
1. Ambleweb Subtraction Machine - Choose from 3 levels and practice subtraction skills.
2. Balloon Pop Subtraction for Kids - (Grades 1-2) Select from 3 levels of difficulty. Solve each problem and pop the balloons until the amount of balloons left answer the problem.
3. Bowling Subtraction - Bowl down pins by answering subtraction problems.
4. Checking Subtraction - Weblesson and practice problems exploring the inverse relationship of addition and subtraction.
5. Hidden Picture - Select the problem that equals the answer provided to reveal a hidden picture.
6. Island Chase Subtraction - "Multi-player racing game that allows students from anywhere in the world to race one another while practicing their facts." You can select to play against others or just yourself.
7. It's A Fact - Practice basic subtraction facts.
8. Math Baseball - Practice numbers less than 5. Fill in the missing number to complete the subtraction problem. For more of a challenge, try 2 digit problems.
9. Math Facts - Select subtraction and choose to practice sums to 10, sums to 12, or sums to 20.
10. Math Magician - Select a number to practice subtracting (0-9), or select a mixture of problems.
11. Mental Math - Select subtraction as the topic and choose from 3 levels: Level 1 = 1 digit numbers, Level 2 = 2 digit numbers, Level 3 = 3 digit numbers.
12. Minus Mission - Choose the content range (1-20). Aim for the slime blob with the correct subtraction problem.
13. Number Eaters - Select subtraction and begin playing. Eat the problems that make the difference of the number provided, but be careful not to get eaten by the number eater!
14. SpacyMath - Use only your first name to sign in. Select "Subtraction" to play game and solve the problems to blast the spaceship. You can also choose to practice addition, multiplication, and division skills.
15. Speed Grid Challenge: Subtraction - (Level 1) Set the number of questions (2-99) and the time limit (1-10). Answer question set by clicking on two numbers that complete the sentence.
16. Subtraction: Numbers to 12 - Practice subtracting and click on "next game" to continue with more problems. Also try 2 digit numbers to 100.
17. Subtraction for Two Digits - Subtraction for two digits with borrowing.
18. Sum Sense: Subtraction - Single-digit subtraction. Set the number of questions (2-99) and the time limit (1-10). Drag the numbered cards to correctly complete the sentence.
19. Test the Toad - Subtract (or add) numbers from 1 to 15 by clicking on the numbered person.
20. Tic-Tac-Toe Squares -From Fun Brain. Practice subtracting 1 digit numbers. For more of a challenge, try subtracting 2 digit numbers.
2. Index and Databases of Activities
1. 2nd Grade Subtraction - Huge selection of activities including basic skills subtraction, multiple choice problems and fill in the blank problems.
2. Subtraction - [From FreeMathTest] Choose level of difficulty or customize for any number range and then select the number of questions.
3. Subtracting - A variety of exercises on "Subtracting Facts to 20" and "Subtracting 2-Digit Number".
4. Subtracting Numbers - Numerous lessons and activities for Grade 2.
3. Practice Tests and Quizzes
1. The Art of Math - Create your own math tests. Click on "Create Challenge" and set the number of problems, problem type, and the range of numbers to generate an endless number of challenges. (Can also be used for subtraction, multiplication, or a mixture of problem types)
2. Subtract within 100 with regrouping - Online quiz that is self checking.
3. Subtract within 100 without regrouping - Online quiz that is self checking
4. Subtract within 100 (2-digits only) - Online quiz that is self checking
5. Subtract a two-digit from a three-digit number - Online quiz that is self checking
6. Subtract a three-digit from a three-digit number - Online quiz that is self checking
7. Mentally add or subtract 10 or 100 with a number between 100 and 900 - Online quiz that is self checking
8. Mentally add 100 to or subtract 100 from a number between 100 and 900 - Online quiz that is self checking
9. Mentally subtract 10 from a number between 100 and 900 -Online quiz that is self checking
10. Mentally subtract 100 from a number between 100 and 900 - Online quiz that is self checking
11. Mentally add 10 to or subtract 10 from a number between 100 and 900 - Online quiz that is self checking

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