2.1 Integers & Absolute Value2.2 Adding Integers

Vocabulary Negative numbers: numbers less than

zero. Integers: all the whole numbers, zero,

and all the negative whole numbers. { …-3,-2,-1,0,1,2,3,…} Zero is not positive or negative. Absolute value: the distance away from

zero on a number line.

|3| = 3 the absolute value of a positive number is just that same number.

|-3| = 3 the absolute value of a negative number is its opposite.

EXAMPLES: Page 59: # 1-19

Adding Integers Two Rules:

1. To add numbers with the same sign, ADD the absolute values and the answer has the same sign as the original numbers.

EXAMPLE: 3 + 16 = 19 -3 + -5 = -8

2. To ADD numbers with different signs, SUBTRACT the absolutes values and the answer has the same sign as the number with the largest absolute value.

EXAMPLE: -3 + 7 = 7 - 3 = 4 -5 + 2 = 5 - 2 = -3 4 + -10 = 10 – 4 = -6

Homework:

Page 67: # 12-44 EVENS