1. Solve each of the following addition and subtraction problems.
a. 82 + 25 + 92 = ?
b. (-25) + (-12) + (-34) = ?
c. 17.5 + 22.25 + (-42) = ?
d. (-23) - 45-(-98) = ?
e. -7 + (-11) = ?
f. -10 + 6 = ?
g. 10 + (-6) = ?
h. -12 + 19 = ?
i. -20 + 20 = ?