Lesson 13

MULTIPLE SYMBOLS OF INCLUSION-MORE ON ORDER OF OPERATIONS-PRODUCTS OF SIGNED NUMBERS Simplify expression by beginning with the innermost symbol of inclusion & work your way out.

Ex 13.1 4{2[(-3 – 2)(-7 + 4) – 5]} – 2 4{2[(-5)(-3) – 5]} – 2

Simplified within parentheses

4{2[10]} – 2 4{20} – 2 80 – 2

Simplified within brackets Simplified within braces Multiplied 4 x 20

78

Added

LESSON 13 CONTINUED Remember PEMDAS!!!!!!!

DO ALL OPERATIONS IN ORDER ACCORDING TO PEMDAS FROM LEFT TO RIGHT IN THE ORDER IN WHICH THEY ARE ENCOUNTERED Ex. 6 + 3 x 6÷2 – 6 x 2 6 + 18÷2 – 6 x 2

Multiplied 3 x 6

6 + 9 – 6 x 2 6 + 9 – 12

Divided 18 by 2 Multiplied 6 by 2

15 – 12 3

Added 6 and 9 Added 15 & -12

On line practice: http://amby.com/educate/ord op/pretest.html