1.
Solve 16 =
k
+ 10 using mental math.
A.
6
B.
8
C.
9
D.
10
Hint
2.
Identify the solution of 84 ÷
r
= 12.
A.
7
B.
72
C.
21
D.
6
Hint
3.
Determine which equation is true by replacing the variable with 2.
A.
6
x
= 8
B.
2
x
+ 2 = 8
C.
6
x
+ 4 = 16
D.
6
x
+ 2 = 10
Hint
4.
Solve 3 = 9 –
n
using mental math.
A.
7
B.
9
C.
3
D.
6
Hint
5.
For which equation is 5 the solution?
A.
3 –
x
= 2
B.
x
+ 3 = 5
C.
x
– 3 = 2
D.
5 +
x
= 5
Hint