Asked by Mary Ann
A positive integer minus a positive integer is always positive.
This statement is sometimes true. For example, 17 – 5 = 12, but 15 – 20 = –5.
post five other statements about the addition and subtraction of positive and negative integers, and ask whether each is always true, sometimes true, or never true.
This statement is sometimes true. For example, 17 – 5 = 12, but 15 – 20 = –5.
post five other statements about the addition and subtraction of positive and negative integers, and ask whether each is always true, sometimes true, or never true.
Answers
Answered by
Jai
If only two numbers are involved,
Let A and B be real, non-zero numbers.
1) (+)A + (+)B = (+) ?
This is always true.
2) (-)A + (-)B = (-) ?
This is always true.
3) (+)A - (-)B = (+) ?
This is always true.
4) (-)A - (+)B = (-) ?
This is always true.
5) (-)A - (-)B = (+) ?
This is not always true. For instance,
-5 - (-3) = -2, but -3 - (-5) = +2.
Hope this helps~ :3
Let A and B be real, non-zero numbers.
1) (+)A + (+)B = (+) ?
This is always true.
2) (-)A + (-)B = (-) ?
This is always true.
3) (+)A - (-)B = (+) ?
This is always true.
4) (-)A - (+)B = (-) ?
This is always true.
5) (-)A - (-)B = (+) ?
This is not always true. For instance,
-5 - (-3) = -2, but -3 - (-5) = +2.
Hope this helps~ :3
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