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ss7ja [257]
3 years ago
6

Explain how you know whether to add or subtract when you use the Distributive Property to multiply.

Mathematics
1 answer:
kaheart [24]3 years ago
4 0
Ex.


(4 x 4) + (4 x 2) = 24
   16    +     8


So, how did I know how to add these two? Well, using PEMDAS (Parenthesis, Exponent, Multiplication, Division, Addition, Subtraction) we know whatever's in the parenthesis is what we do first. Since we have to sets of multiplication problems in parenthesis, we can solve either one first, but still regarding the rule of PEMDAS. Make notice of the + sign (bold) in between the two parenthesis. This tell me I will add the two products and get my final answer. But let's say it were the be subtraction oppose to addition.

Ex.

(4 x 4) - (4 x 2) = 8
   16    -    8

Using PEMDAS, I did the parenthesis first. I knew to subtract because of the - sign in the equation, leading to my difference.
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1. Approanch

An easy way to calculate one's salary after they recive a raise is to, convert the percent that one's salary is increased into a decimal; divide the percent by 100. Then multiply the increase as a decimal by the original salary, to attain the amount the salary is raised by. Finally add the amount the salary is raised by to the original salary to find the new salary. A quicker way to do this is to convert the percent by the salary is increased into a decimal. Then add 1 to that number. Finally one will multiply that number by the original slary and get the new salary.

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<u>a. convert the raise as a percent into a decimal, then add 1</u>

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