Order of operations with negative numbers

The topic  appears under the 7th Grade Math Mission. This exercise uses the order of operations (PEMDAS) on problems with negative numbers.

Types of Problems
There is one type of problem in this exercise:


 * 1) Use order of operations to evaluate: This problem has a numerical expression that makes use of many operation and types of numbers, including negatives. The student is asked to evaluate the expression correctly and provide the answer in the space provided.Oownn1.png

Strategies
Knowledge of PEMDAS is needed to complete this problem correctly.
 * 1) The order if operations are to do operations inside parentheses first, followed by exponents (and possibly radicals), then multiplication and division in order from left to right, and finally addition and subtraction in order from left to right.
 * 2) PEMDAS is an acronym to remember the order of operations, but it can be deceiving because it seems to imply that multiplication outranks division and addition outranks subtraction.
 * 3) "Please excuse my dear Aunt Sally" is another mnemonic to help remember the order of operations.
 * 4) The order of operations is determined by the fact that addition (and it's inverse operation subtraction) are the simplest operations. Multiplication and division are repeated addition and subtraction respectively. Finally, exponentiation is repeated multiplication (which in turn is repeated addition).