# Pre-Algebra Math Flashcards Q2 Test(:

## 15 terms · CIA QUARTER 2 TEST!!!!!!

The sum of an integer and its opposite is zero.

The sum of 2 positive integers is positive and the sum of 2 negative integers is negative

To add integers with different signs find the difference of their absolute value.

### Adding Integers (different signs cont.)

The sum has the sign of the integer with the greater absolute value.

### Subtracting Integers

To subtract an integer is to add its opposite.

### Keep, Change, Change

KEEP: the 1st number the same.
CHANGE: the sign to its opposite.
CHANGE: the 2nd number to its opposite.

### Multiplying Integers

Same sign = positive
Different signs = negative
Zero and any integer = zero

### Dividing Integers

Same sign = positive
Different sign = negative
By zero and any integer = undiffined

### Average

To find the average
. Use order of operations.
.(The fraction bar acts as a grouping symbol.)

### Coordinate Plane

Is formed by intersections of 2 number lines (x,y axis)

### Y axis

Vertical number line.

### X axis

horizontal number line.