1.
Solve 12 −
v
= 7 mentally.
A.
v
= 5
B.
v
= 19
C.
v
= 2
D.
v
= 7
Hint
2.
Solve 10 +
r
= 23 mentally.
A.
r
= 7
B.
r
= 33
C.
r
= 3
D.
r
= 13
Hint
3.
Solve 12 +
h
= 22 mentally.
A.
h
= 8
B.
h
= 12
C.
h
= 10
D.
h
= 34
Hint
4.
Solve 15 −
v
= 7 mentally.
A.
v
= 8
B.
v
= 22
C.
v
= 7
D.
v
= 6
Hint
5.
If
m
− 4 = 11, what is the value of
m
?
A.
11
B.
19
C.
15
D.
4
Hint