delores funk
If you think this question through by yourself, you will see that you started out with 7 pennies, you took away 10 of them, you overdrew your bank account by three pennies, you owe the bank three pennies. You pay back four pennies and now you owe them only one penny right? One penny times three pennies will give you three pennies. I wasn't a mathematician when I went to school more than fifty years ago, but I think I remember getting an "A"+ for answering this question. Did the teacher give me the right grade? Ken in N.H.
11 Answers
jhharlan
Flip
Bob/PKB
As far as I know, the procedure Chelleanne gave you is correct....follow the order of operations.
If you took this problem and worked it straight across, though, this is what you would have:
7 - 10 (-3) + 4 (1) x 3 = 3
You must do the multiplication first, though, (4 x 3 ) = 12
Then, you do the rest of it from left to right (subtract/add)
7 - 10 (-3) + 12 = 9
| 10 years ago. Rating: 2 | |
chelleanne
7-10+4x3=
Order of Operation > PEMDAS
P > Parentheses first
E > Exponents (ie Powers and Square Roots, etc.)
MD > Multiplication and Division (left-to-right)
AS > Addition and Subtraction (left-to-right)
7 - 10 + 4 x 3 =
7 - 10 + (4 x 3)
7 - 10 + 12
(7 - 10) + 12
-3 + 12
9
| 11 years ago. Rating: 2 | |
presto0801
donna.johnson.36582
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mrphixit
in mathematics and most computer languages multiplication is done before addition; in the expression 2 + 3 × 4, the answer is 14. Brackets, "( and ), { and }, or [ and ]", which have their own rules, may be used to avoid confusion, thus the preceding expression may also be rendered 2 + (3 × 4), but the brackets are unnecessary as multiplication still has precedence without them..
Therefor 7-10+(3x4)
7-10+12
7-10=-3+12=9
If you doubt this answer enter [+7-10+3*4] into an Excel spreadsheet cell.
The answer is 9
| 12 years ago. Rating: 1 | |
husky64
mycatsmom
How can you minus 10 from 7...........? .......unless you're talking about negative numbers. Is there really such a thing as negative numbers, or were they only invented for the sake of making it easier on mathematicians to create more confusing math problems.?
| 10 years ago. Rating: 0 | |
Look at it this way. Say you owe Sandy $10, but you only have $7 to give her. That means you are in the hold for $3, money you don't have. So, that means -$3.
