Monday, January 5, 2015

R-6

Is this true or false?

Every subtraction problem can be rewritten as an addition problem.

True or not?

Give Examples.

Why is is true or why is it not true? (Think about the chips)

Delaney's
-4+3=-1
-1-3=-4

-Moves the order
-different answers
-Negative answers
-Fact family

Flynn's
3-1=2
3+(-1)=2

Jackson's
7-6=1
7+(-6)=1

Jack's 
7-5=2
7+(-5)=2

-Same abs value numbers

Adding is easier than subtracting. +

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