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Why plus multiply minus will make minus Related: Examples(NCERT):Prop...
2 x 3 =6
2 x 2 =4
2 x 1 =2
2 x 0 =0
2 x (-1) = (-2)
This makes sense. If I have 2 “negative 1’s”, I’ve clearly got “negative 2”
Another pattern:
-1 x 2 = -2
-1 x 1 = -1
-1 x 0 = 0
-1 x -1 = 1
-1 x -2 = 2
So, following this pattern leads us to the conclusion that a “minus multiplied by a minus is a plus”.
This also makes sense.
Remember that “multiplying” is really just repeated “addition”.
Imagine I had a car worth $1000. If I ADDED a dent worth, let’s say -$100, my car is now worth $900. If I then have the dent removed, I have taken away -$100 and my car goes up in value. 900-(-100)=1000.
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Why plus multiply minus will make minus Related: Examples(NCERT):Properties of Multiplication of Integers, Integers, Class 7 Math
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