Missing Number in an Open Sentence

🔍 Missing Numbers in Open Sentences Quiz

Find the Value that Makes Each Statement True

📋 Instructions: An open sentence contains a variable (like □ or x) that makes the statement incomplete. Find the value that makes each open sentence true by solving for the missing number.

1. Find the missing number: □ + 7 = 15

a) 8 b) 22 c) 7 d) 15

2. Find the missing number: 3 × □ = 21

a) 6 b) 7 c) 18 d) 24

3. Find the missing number: 20 - □ = 12

a) 32 b) 8 c) 12 d) 20

4. Find the missing number: □ ÷ 4 = 9

a) 13 b) 5 c) 36 d) 2.25

5. Find the missing number: 5 + □ - 3 = 10

a) 8 b) 12 c) 2 d) 18

6. Find the missing number: 2 × □ + 5 = 17

a) 11 b) 6 c) 12 d) 22

7. Find the missing number: □ - 8 = 15

a) 7 b) 23 c) 120 d) 1.875

8. Find the missing number: 48 ÷ □ = 6

a) 42 b) 8 c) 54 d) 288

9. Find the missing number: 3 × (□ + 4) = 21

a) 3 b) 7 c) 11 d) 25

10. Find the missing number: □ × 6 - 10 = 32

a) 4 b) 7 c) 22 d) 252