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Grade 8 math questions? I'm not asking you to do my homework, just need help?

+1 vote

I've got a test tomorrow and can someone teach me how to do these questions? This isn't my homework, these is just optional review questions that our teacher suggested we try to study for the test. It's not getting marked or anything, promise. If you can even solve one, I'll appreciate it. Babe.

A) FRACTIONS
1/2 + 2/3 ÷ 4/15


THANKS!!!
Appreciate it.

asked Feb 8, 2013 in ALGEBRA 1 by payton Apprentice

1 Answer

0 votes

1/2 + 2/3 ÷ 4/15

Order of Operations:

To simplify the expression follow the order of operations: (PEMDAS)

1.      Evaluate the expressions inside the Parenthesis/Brackets (P).

2.      Evaluate Powers/Exponents (E).

3.      Multiply and/or Divide in order from left to right (MD).

4.      Add and/or Subtract in order from left to right (AS)

A simple technique for remembering the order of operations is turned into phrase "Please Excuse My Dear Aunty Sally".

simplify the expression 1/2 + 2/3 ÷ 4/15 using order of operations.

First operation is evaluating expression within the divide.

1/2 + 2/3 ÷ 4/15

Invert 4/15 and multiply.

1/2 + (2/3 ×15/4)

1/2 + 30/12

1/2 + 5/2

Rewrite the expression with common denominator.

(1 + 5)/2 = 6/2 = 3

Therefore 1/2 + 2/3 ÷ 4/15 = 3

answered Feb 8, 2013 by britally Apprentice

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