2007-01-18 09:38:36 · 4 answers · asked by sara_shhd 1 in Science & Mathematics ➔ Mathematics
Evaluate everything within parentheses first.
Then evaluate exponents.
Then multiplication and division at the same time, moving left to right.
Then addition and subtraction at the same time, moving left to right.
2^3 + 4^3/8*7 - 7 + 10
8 + 4^3/8*7 - 7 + 10
8 + 64/8*7 - 7 + 10
8 + 8*7 - 7 + 10
8 + 56 -7 + 10
64 - 7 + 10
57 + 10
67
2007-01-18 09:48:34 · answer #1 · answered by Mark P 5 · 0⤊ 0⤋
The old acronym for remembering this was PERMDAS but I guess there are definite exceptions to the suggested orders of this: anyway it's the 1) parenthetical 2)powers 3)radicals 4) multipication 5)division 6)addition and 7)subtraction
2007-01-18 17:49:38 · answer #2 · answered by cherodman4u 4 · 0⤊ 0⤋
Some people say Please Excuse My Dear Aunt Sally, which is supposed to help you remember PEMDAS, which is short for:
Parentheses
Exponents
Multiply & Divide
Add & Subtract
Some people use "G" for "Grouping symbols" instead of "P".
Example:
3/4*2^(7-2)-4^2+7/5*2. Here we evaluate (7-2) first.
=3/4*2^5-4^2+7/5*2. Now we do exponents.
=3/4*32-16+7/5*2. Now we do multiplication and division, in left-to-right order.
=0.75*32-16+7/5*2
=24-16+7/5*2
=24-16+1.4*2
=24-16+2.8. Now we do addition and subtraction in left-to-right order.
=8+2.8
=10.8
2007-01-18 17:56:49 · answer #3 · answered by Doc B 6 · 0⤊ 0⤋
BEDMAS
B rackets
E xponents
D ividing
M ultiplying
A ddition
S ubtraction
2007-01-18 17:45:18 · answer #4 · answered by Anonymous · 0⤊ 0⤋