Unlocking The Secrets of Math.
Simple Steps To Becoming A Better Mathematician.
Working With Positive and Negative Integers.
(Rule one) when adding integers with like
signs, just add the numbers and take that sign. (+7)+(+6)=(+13).
(Rule two)when adding integers with signs
that are not alike, subtract the smaller number from the larger one then apply the sign from the larger number to your answer. (+14)+(-8)=(+6).
(Rule Three) When subtracting integers sprinkle Magic Dust on the subtraction sign and the sign of the next number. This will change the Subtraction sign to addition and the sign of the next number to it’s opposite sign. Then use Rule One or Two which ever applies. Rule 1 (+23)-(-17)=? (+23)+(+17)=+40 Rule 2 (+23)-(+17)=? (+23)+(-17)=+6
Working With Decimals
When working addition, division and subtraction problems that contain decimals always keep the decimals in vertical alignment. 12.353 +31.44 43.793 37.24 - 31.17 6.07 2.01 21 42.21 -42 21 -21
When multiplying numbers with decimals work the problem then count how many numbers you have to the right of the decimals in your problem. Then counting from the right of your answer insert your decimal in the proper place.
24.3
x 2.11
243 2430 48600 51273 <—> 51.273
Order of operations
When working with
numbers there is a set sequence or order of operations. One way to remember this sequence is by using this memory device. Please Excuse My Dear Aunt Sue.
Parentheses
Exponents
Multiplication
Division
Addition Subtraction