11 items are filed under this topic.
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A puzzling equation |
2018-12-04 |
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From Manny:
Hello,
Can you explain why this is wrong:
-1 = (-1)^3 = (-1)^{6/2} = ((-1)^6)^{1/2} = (1)^{1/2} = 1 ??
Thank you
Answered by Penny Nom. |
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Adding two negatives |
2018-02-04 |
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From Pinasshakoane:
(-23)+(-3)
Answered by Penny Nom. |
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A negative times a negative |
2010-03-25 |
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From priya:
why is minus into minus plus?
Answered by Harley Weston. |
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Multiplcation of two negative numbers |
2007-07-26 |
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From Brett:
Someone asked a question about multiplication and division of two negative numbers yielding a positive result here:
http://mathcentral.uregina.ca/qq/database/QQ.09.99/butler1.html I was not fully happy with the explanation b/c I want to give me daughter a real-world example and I can't seem to find one.
The following illustrates why multiplying negative numbers has become difficult to explain:
2 X 2 = 4
----(-4)---(-2)---0---2---4
In this example we start with 2 and then want 2 more of them.
When we move across the number line from 2 to our answer, which is four, we have moved only 2 units to the right.
-2 X -2 = 4
----(-4)---(-2)---0---2---4
In this example we start with -2 and then want -2 more of them.
When we move across the number line from -2 to our answer, which is four, we have moved 6 units to the right.
How can the phenomenon of multiplying two negative numbers being more powerful than multiplying two positive numbers be explained?
-Brett
Answered by Stephen La Rocque and Harley Weston. |
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What is the difference between -(3) and (-3)? |
2007-02-11 |
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From Mckaylla:
What is the difference between -(3) and (-3)?
Answered by Melanie Tyrer. |
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-3^4 and (-3)^4 |
2005-12-17 |
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From Brad:
What is the answer to
-34 = ?
-(3)4 = ?
(-3)4 = ?
Answered by Penny Nom. |
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-120 divided by -15 |
2005-11-09 |
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From Joshua:
how do you evaluate -120 divided by (-15)
Answered by Penny Nom. |
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12-42, 8-26, 10-34, 9-30, 16-58 |
2005-08-31 |
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From Elizabeth:
here is a math question my niece gave me, grade 7
12-42, 8-26, 10-34, 9-30, 16-58
first day of school and this is what they give her no explanation
Answered by Harley Weston. |
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The sum of two numbers is 5 and their difference is |
2003-06-16 |
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From Akhil:
The sum of two numbers is 5 and their difference is 11. What is the product of the two numbers?
Answered by Penny Nom. |
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F = -3 + 3 |
2002-03-19 |
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From Jessica:
F= -3 + 3 WHAT IS F?????
Answered by Penny Nom. |
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A negative times a negative |
2000-02-29 |
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From Michael J. Butler :
I have reviewed the answer in relation to the question of why (-3)x(-2)=6; however, I am still not able to properly explain the reasoning to my son, Jonathan, who is in grade 7. I want him to understand the reason for the rule that the multiplication or division of two negative numbers equals a positive number. Can you help?
Answered by Chris Fisher. |
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