1.
Solve
h
+ 2 = 5 mentally.
A.
h
= 7
B.
h
= 2
C.
h
= 5
D.
h
= 3
Hint
2.
Solve
n
− 12 = 12 mentally.
A.
n
= 12
B.
n
= 18
C.
n
= 0
D.
n
= 24
Hint
3.
Solve 18 −
d
= 5 mentally.
A.
d
= 8
B.
d
= 13
C.
d
= 5
D.
d
= 23
Hint
4.
Solve
n
- 15 = 15 mentally.
A.
n
= 0
B.
n
= 30
C.
n
= 15
D.
n
= 45
Hint
5.
If
m
− 4 = 11, what is the value of
m
?
A.
19
B.
4
C.
11
D.
15
Hint