1.
Find the solution of 72 +
z
= 84 if the value of
z
can be selected from the set {4, 8, 12, 16}.
A.
4
B.
8
C.
12
D.
16
Hint
2.
Which number is a solution to
x
+ 7 = 16?
A.
23
B.
9
C.
10
D.
8
Hint
3.
The inequality 18 < 14 is ______.
A.
true
B.
complete
C.
open
D.
false
Hint
4.
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.
6
2
– 21 = 5 × 4 + 8
D.
5
2
– 21 > 5 × 4 + 8
Hint
5.
The number sentence below is false. Make the sentence true by changing one symbol or number. Find the correct number sentence.
6 + 14 ÷ 2 = (6 + 12) ? 2 + 3
A.
6 + 14 ÷ 2 = (6 + 14) ÷ 2 + 3
B.
6 + 14 ÷ 2 = (6 + 12) ÷ 4 + 3
C.
6 + 14 ÷ 4 = (6 + 12) ÷ 2 + 3
D.
6 + 14 ÷ 2 < (6 + 12) ÷ 2 + 3
Hint