math
posted by Melissa on .
The question says ..
match the equivalent addition and subtraction expressions
a) 6 9
b)10  (12)
c)69
d)1012
e)1210
A)10+(12)
B)6+(9)
C)12 + (10)
D)6+(9)
E)10+12

Convert a) through e) to addition expressions
Change the sign to + and change the sign of the number to the opposite of what it is.
a) 6  9 = 6 + (9)
b) 10  (12) = 10 + 12
Now you do c), d) and e)