1.
Find the solution of 72 +
z
= 84 if the value of
z
can be selected from the set {4, 8, 12, 16}.
A.
12
B.
8
C.
4
D.
16
Hint
2.
The number sentence below is false. Make the sentence true by changing one symbol or number. Find the correct number sentence.
5
2
– 21 = 5 × 4 + 8
A.
5
2
– 21 < 5 × 4 + 8
B.
5
2
– 21 = 5 × 5 + 8
C.
5
2
– 21 > 5 × 4 + 8
D.
6
2
– 21 = 5 × 4 + 8
Hint
3.
Fill in the ovals for the flowchart.
A.
30, 33
B.
30, 27
C.
33, 30
D.
30, 11
Hint
4.
Use the flowchart to backtrack and find the solution.
A.
B.
C.
11
D.
14
Hint
5.
Find a solution to the equation using guess-check-and-improve.
8
b
+ 17 = 41
A.
b
= 1
B.
b
= 17
C.
b
= 18
D.
b
= 3
Hint
6.
Which equation would it be easiest to solve using the guess-check-and-improve method?
A.
(10 –
y
) ×
y
= 77
B.
19 = 53 + 31
y
C.
36 · (5
y
+ 20) = 146
D.
Hint