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sub·trac·tion
[suhb-trak-shuhn]
NOUN
1.
an act or instance of subtracting.
2.
Mathematics. the operation or process of finding the difference between two numbers or quantities, denoted by a minus sign (−).
Source: Dictionary.com
subtraction | Define subtraction at Dictionary.com
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Subtraction - Wikipedia

en.wikipedia.org/wiki/Subtraction

Subtraction is a mathematical operation that represents the operation of removing objects from a collection. It is signified by the minus sign (−). For example, in ...

Subtraction - Math is Fun

www.mathsisfun.com/numbers/subtraction.html

subtraction 5 apples - 2 apples = 3 apples, Start with 5 apples, then subtract 2, we are left with 3 apples. anna with 3 apples. This can be written: 5 − 2 = 3 ...

Free Subtraction Math Games | Multiplication.com

www.multiplication.com/games/subtraction-games

Subtraction Games - Free online math games for students. Practice subtraction facts while having fun at Multiplication.com.

Balloon Pop Subtraction | ABCya!

www.abcya.com/subtraction_game.htm

ABCya! This elementary activity is great fun for all kids learning subtraction! Kids are presented with subtraction problems and need to pop balloons to find the ...

Worked example: Subtracting 3-digit numbers (regrouping ...

www.khanacademy.org/math/arithmetic-home/addition-subtraction/regrouping-3-dig/v/basic-regrouping-or-borrowing-when-subtracting-three-digit-numbers

Learn to use regrouping (borrowing) and place value to subtract 971-659.

Subtraction.com + Khoi Vinh's Web site

www.subtraction.com/

Life and thoughts of Khoi Vin, a graphic designer in New York City.

Dynamically Created Subtraction Worksheets - Math Aids

www.math-aids.com/Subtraction/

These dynamically created subtraction worksheets allow you to select different variables to customize for your needs.

Ducky Race Subtraction | MathPlayground.com

www.mathplayground.com/ASB_Ducky_Race_Subtraction.html

Play Ducky Race Subtraction at Math Playground! Practice subtraction facts in a duck racing math game.