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