1.
Determine which equation is true by replacing the variable with 4.
A.
5 +
x
= 9
B.
5 +
x
= 10
C.
5 +
x
= 5
D.
5 +
x
= 4
Hint
2.
Solve 16 =
k
+ 10 using mental math.
A.
10
B.
6
C.
9
D.
8
Hint
3.
Determine which equation is true by replacing the variable with 2.
A.
6
x
+ 2 = 10
B.
2
x
+ 2 = 8
C.
6
x
= 8
D.
6
x
+ 4 = 16
Hint
4.
Which of the numbers is the solution of
x
÷ 2 – 4 = 10?
A.
26
B.
30
C.
28
D.
32
Hint
5.
Solve 24 = 2
m
mentally.
A.
48
B.
12
C.
4
D.
22
Hint