Positives and Negatives 4 3 2 1 0

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Positives and Negatives -4 -3 -2 -1 0 1 2 3 4 5

Positives and Negatives -4 -3 -2 -1 0 1 2 3 4 5

Meet Pete The Positive Pirate

Meet Pete The Positive Pirate

Together, they’re called the “Positives”

Together, they’re called the “Positives”

Now meet their arch enemies…

Now meet their arch enemies…

Ned The Negative Ninja

Ned The Negative Ninja

Together, they’re called the “Negatives”

Together, they’re called the “Negatives”

These two don’t like each other very much.

These two don’t like each other very much.

Every time they meet, they always fight Hiiii-Yah! Yaaaar going down! And they ALWAYS

Every time they meet, they always fight Hiiii-Yah! Yaaaar going down! And they ALWAYS destroy each other in the process

So what happens when a lot of positives… …are confronted by a bunch of

So what happens when a lot of positives… …are confronted by a bunch of negatives

+1 -3 3 negatives 1 Positive is left after the battle +4 4 positives

+1 -3 3 negatives 1 Positive is left after the battle +4 4 positives

-3 3 negatives are left -8 +5

-3 3 negatives are left -8 +5

+8 8 Positives are left -7 +15

+8 8 Positives are left -7 +15

When you’ve got 2 positives… Hi! Hello! +9 9 Positives +4 They combine to

When you’ve got 2 positives… Hi! Hello! +9 9 Positives +4 They combine to make a bigger positive! +5

-4 and -8 combined equals… Hello! Hi! -12 12 Negatives -4 -8

-4 and -8 combined equals… Hello! Hi! -12 12 Negatives -4 -8

So lets review what we learned… +1 -1 = 0 -3 +4 = +1

So lets review what we learned… +1 -1 = 0 -3 +4 = +1 -8 +5 = -3 -7 +15 = +8 +4 +5 = +9 -4 -8 = -12

Take Note: +1 -1 = 0 -3 +4 = +1 -8 +5 = -3

Take Note: +1 -1 = 0 -3 +4 = +1 -8 +5 = -3 -7 +15 = +8 +4 +5 = +9 -4 -8 = -12

Take Note: +1 -1 = 0 When you have a positive and -3 +4

Take Note: +1 -1 = 0 When you have a positive and -3 +4 = +1 a negative number, you -8 +5 = -3 subtract -7 +15 = +8 +4 +5 = +9 -4 -8 = -12

Take Note: +1 -1 = 0 When you have a positive and -3 +4

Take Note: +1 -1 = 0 When you have a positive and -3 +4 = +1 a negative number, you -8 +5 = -3 subtract -7 +15 = +8 +4 +5 = +9 -4 -8 = -12 When you have 2 positives or 2 negatives, you add them up

But after we subtract, how do we know whether the answer will be positive

But after we subtract, how do we know whether the answer will be positive or negative? +1 -1 = 0 -3 +4 = +1 -8 +5 = -3 -7 +15 = +8 +4 +5 = +9 -4 -8 = -12

For Example… -12 +9 = -3 The larger number always wins! Since there are

For Example… -12 +9 = -3 The larger number always wins! Since there are more negatives than positives, the answer is negative

For Example… -3 +7 = +4 The larger number always wins! Since there are

For Example… -3 +7 = +4 The larger number always wins! Since there are more positives than negatives, the answer is positive

Sample Problems

Sample Problems

Who Will Win The Battle? Will the answer be positive or negative? +8 -14

Who Will Win The Battle? Will the answer be positive or negative? +8 -14 = +2 -4 = -13 +15 = + -9 -4 = -28 +31 = + +2 +16 = +

Who Will Win The Battle? Should you add or subtract? Subtract +8 -14 =

Who Will Win The Battle? Should you add or subtract? Subtract +8 -14 = Subtract +2 -4 = Subtract -13 +15 = Add -9 -4 = - + Subtract -28 +31 = + Add +2 +16 = +

Who Will Win The Battle? Solve the problem Subtract +8 -14 = - 6

Who Will Win The Battle? Solve the problem Subtract +8 -14 = - 6 Subtract +2 -4 = - 2 Subtract -13 +15 = + 2 Add -9 -4 = - 13 Subtract -28 +31 = Add +2 +16 = +3 + 18

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