Slide 2 The upside of negativity Introduction to subtracting
integers Video #5 about integers #1 about subtracting integers
Slide 3 Negative numbers. Negative numbers are the opposite of
positive numbers. +++ - - - +++ - - - Slide 4 Slide 5 + - Slide 6
Addition means to put two things together. Slide 7 Slide 8 If were
adding numbers of opposite signs, we have to do the opposite
operation SUBTRACT. So + does not always mean we get more. Slide 9
Is the same as 6 2 Which is 4. If this is confusing, review the
earlier lesson on adding integers. Slide 10 And guess what? Slide
11 Its the opposite of adding. Yea, you know that. Lets know it
*and* apply it. Slide 12 6 + -2 is the same as 6 2 Which is 4.
Slide 13 If 6 + -2 is the same as 6 -2, then . 6 2 is the same as 6
+ -2, right? We just switched the order we said it in. Slide 14 We
can solve it by *adding* the *opposite.* Slide 15 . Change
subtraction to addition but its not quite that simple. My bank
account would *love* it if I could do that. If I *just* change the
minus sign to plus, Im doing the opposite of what Im supposed to
do. Slide 16 Adding the OPPOSITE -- change two things - Then were
back in balance, and doing what the problem says to do. (The people
who say change subtraction to addition expect you to remember to
*also* change the sign of the number youre subtracting.) Slide 17
Thats right, the rules havent changed. But we can think of this in
a more advanced way 6 2 = 6 + -2, which of course = 4 because same
sign, add and keep different sign subtract! Keep the sign of the
bigger number, Then youll be exact! Slide 18 6 2 = 6 + - 2 Slide 19
Opposites are you know, not the same. Opposite. Backwards is not
forwards. Theyre opposite. HOWEVER, its not like theyre just
different, like cherry and pineapple. if you turn around and turn
around again youre going the same direction again. Yes is the
opposite of no but if you *refuse* to say *no* then havent you
really said yes? Slide 20 Give these guys the bam! Bam! treatment 6
550 - 25 10 340 - 20 10 410 5 Slide 21 If the new problems look
like this, you have 100 % A + 6 + 550 + -25 10 + 340 + -20 10 + 410
+ 5 Slide 22 6 + 5= 150 + -25 = 25 10 + 3= 740 + -20 = 20 10 + 4=
610 + 5 =5 Slide 23 Yes, you already knew 6 5 was one. Next movie
will explain how to solve 5 6. Maybe you can figure it out for
yourself
