Math 7: The Number System (Adding and Subtracting Rational Numbers

Integers

A whole number. A number that IS NOT a fraction.

DSD

Different Signs Difference SUBTRACT Take sign of greater number.

Inverse Property of Addition

Every number has an ADDITIVE INVERSE (Opposite). The sum of a number and its additive inverse is ZERO.

Absolute Value

How far a number is from zero

KCC

Keep Change Change Change SUBTRACTION to ADDITION Change 2nd # to its opposite, then follow rules of addition

SSS

Same Signs Sum ADD Take the sign of a greater number.

Common Denominator

When two or more fraction are common, or the same.