5-Digit Subtraction Sentences

Subtraction Equations: Learn

An equation is a mathematical statement such that the expression on the left side of the equals sign (=) has the same value as the expression on the right side. An example of an equation is 6000 - 4000 = 2000.

One of the terms in an equation may not be know and needs to be determined. Often this unknown term is represented by a letter such as x. (e.g. x - 4000 = 2000).

The solution of an equation is finding the value of the unknown x. To find the value of x we can use the additive equation property which says: The two sides of an equation remain equal if the same number is added to each side.

Example:

x	-	50000	=	70000
		+50000		+50000
x			=	120000

Check the answer by substituting (120000) for x in the original equation. The answer is correct if the expressions on each side of the equals sign have the same value.

120000 - 50000 = 70000
70000 = 70000 (Correct!)

Subtraction Sentences: Practice

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