Hors d'oeuvres #011
Why Our Students—When Problem Solving—Fail in Mathematics? Two Principles!
SIMPLE: They do not know it! Why?
1. The Law of the Signs:
- + x + = + (positive x positive = positive) [First Law]
- + x - = - (positive x negative = negative) [Second Law]
- - x + = - (negative x positive = negative) [Third Law]
- - x - = + (negative x negative = positive) [Fourth Law]
2. Please Excuse My Dear Aunt Sally [PEMDAS].
Just make a follow-up step-by-step and arithmetically solve each itemized task of this sequence:
- Parenthesis
- Exponent
- Multiplication
- Division
- Addition
- Subtraction
Thanks, Aunt Sally!