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basics
commutative property
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100

9x7=

63

100

6x8=

8x6=48

100

4x3x5=

4x3x5=60

100

572 nearest 10 and 100

10=570

100=600

100
what is the commutative property of addition the same as?

a flip flop fact

200

anything multiplied by 0

equals 0

200

6x7=

7x6=42

200

2x7x2

2x7x2=28

200

248 nearest 10 and 100

10=250

100=200

200

What is the difference between a factor and a product?

factor= the number we are multiplying 

product= the answer to a multiplication problem

300

5x25=

125

300

6x6=

6x6=36

300

9x0x7=

9x0x7=0

300

83  nearest 10 and 100

10=80

100=100

300

what does estimate mean?

an educated guess or a smart guess

400

anything multiplied by 1

equals that number

400

5x9=

9x5=45

400

6x4x2

6x4x2=48

400

658  nearest 10 and 100

10=660

100=700

400

 656

-278

--------


378

500

8x8=

64

500

1,647x1=

1x1,647=1,647

500

9x1x10=

9x1x10=90

500

206  nearest 10 and 100

10=210

100=200

500

what is the answer to an addition problem and what is the answer to a subtraction problem?

+= sum

-=difference