Square Roots
Addition Properties
Radicals

100

25

5

100

commutative property

a+b=b+a

100

-12

1/12

200

81

9

200

Associative property

a+(b+c)=(a+b)+c

200

-22

1/22

300

144

12

300

Identity property 

a+0=a

300

-30

1/30

400

225

15

400

Inverse property

a+(-a)=0

400

-46

1/46

500

625

25

500

Closure property

a+b and ab are unique real numbers

500

-7/12

12/7