1.
Which of the numbers is the solution of 3
d
= 12?
A.
3
B.
6
C.
4
D.
2
Hint
2.
Solve 16 =
k
+ 10 using mental math.
A.
10
B.
6
C.
9
D.
8
Hint
3.
Solve 3 = 9 –
n
using mental math.
A.
9
B.
3
C.
6
D.
7
Hint
4.
Solve 24 = 2
m
mentally.
A.
12
B.
4
C.
22
D.
48
Hint
5.
For which equation is 5 the solution?
A.
5 +
x
= 5
B.
x
– 3 = 2
C.
x
+ 3 = 5
D.
3 –
x
= 2
Hint