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Simple algebra help debate between mother and son?
My son and i have a debate , can someone with math knowledge please solve this :
Evaluate:
1/4 (12-8) + 3 (15 divided by 5-2)
Name the property used in each step
1.
2.
3.
4.
5.
6.
Any help here will get 10 points. Thank u.
3 Answers
- Anonymous1 decade agoFavorite Answer
sorry i dont know what properties are, but i would love to help you debate your son.
the steps are:
1/4 (12-8) +3 (15 /5-2)
1/4 (4) + 3 (3-2) parentheses first but division come before subtraction.
1/4(4) + 3(1)
1 + 3
=4
i don't know if i helped but that's the right answer.
- 1 decade ago
ok, so you solve it like this:
1/4 (12-8)+3 [15/(5-2)]
1st you subtract 12-8 since its in parenthesis (PEMDAS) and you also subtract the 5-2 at the end of the problem.
so now it should look something like
1/4 (4)+3[15(3)]
since you dont have any exponents, you go to multiplication.
1/4 times 4 is one and 15 time 3 is 45
now, your equation should look like this:
1+ 3(45)
then you multiply 3 by 45, remember that you do NOT add 1+3, you multiply 3 by 45. Just follow the rules of math (PEMDAS) and youll be fine. so 3 by 45 is 135 and then you add the 1 and your final answer is 136!!! hope this helps you guys out!!!!
1. Parenthesis
2.Exponents
3.Multipication
4. Division
5.Additoin
6.Subtraction
Source(s): Im a high school student taking pre-cal honors - 1 decade ago
I'm not sure what you mean but I'll give it a try
1. you do the brackets ( the abstraction in 1st and division in 2nd)
2. finish brackets ( 2nd brackets abstraction )
3. multiply the results respectively
4. sum the 2 final numbers