Examples:
(combining)
- 7 + 2 = - 5
owe 7 & have 2 = owe 5
－ － － － － － － ＝ negative 5
＋＋
-7
<————— 0
<————|———|————>
——>-5
+2
we owed 7 dollars, but we have 2 dollars, how much do we have now?
we owed more than we have so the answer has to be negative,
7-2 = 5, because we owed more, so the answer is -5.
(removing)
- Ｔo add or subtract something that's not there,
you must add zero pairs.
(only happens when you see two negative sign or two subtract sign right besides each other...)
Ｅxample:
(-7) - (-10) = +3
owe 7 remove owe 10= have 3
－－－－－－－－－－－－－－－－－
＋＋＋＋＋＋＋＋＋＋ ＝ +３
we owed 7 dollars, but we want to re move 10 dollars from 7 dollars,
you can't do it, so we have to add zero pairs, we have to add 10
zero pairs, then remove 10 dollars, we have 7 zero pairs and 3 dollars
left, we cross out the zero pairs then we get positive 3 (3 dollars).
more examples:
(-1) - 2 = -3 we don't need to remove because the two negative signs aren't beside each other.
owe 1 & owe 2 = owe 3
5 - (-2) = +7
have 5 remove owe two = have 7
-7 + 8= +1
owe 7 & have 8= have 1
2 + (-5) = -3
have 2 & owe 5 = owe 3
Your scribe post was very helpful because you explained how to solve the equation. You had also added when to remove negative and positive numbers. Thanks and great video! (:
ReplyDeleteYou helped me out with the removing integers and the video made it look good.
ReplyDeletethe explanations are perfect, I can understand everything.
ReplyDeleteThe video was helpful too
Thank you for explaining the removing integers, you really helped me understand everything.
ReplyDelete