Mat115

What does U mean in a set?

• Union

• Intersection

• Subset

• Proper-subset

What is the meaning of an Intersection?

• Elements not in A

• In both A and B

• In A or B

• A has some elements of B

Draw a 3-loop Venn diagram

A has SOME elements of B

Commutative property of addition

• 9+(6+2) = (9+6)+2

• 3+0 = 0+3

• (7+3)+2 = 7+(3+2)

• 6+4 = 4+6

Draw a number line model

Subtraction model: How much does Alex have left?

• Number line

• Missing addend

• Take away

• Comparison

Model of subtraction for: How many miles did Raab travel?

• Comparison

• Missing addend

• Take away

• Number line

_________ product of sets

Draw a Partition model of division