You're given a worksheet titled
“Missing signs (1)” where you need to fill in the correct mathematical operation (
+,
–,
×, or
÷) to make each equation true.
Let’s go through each problem one by one and explain the reasoning.
---
1. 12 □ 4 = 8
What operation turns 12 and 4 into 8?
- 12 + 4 = 16 → too big
- 12 – 4 =
8 ✔
- 12 × 4 = 48 → way too big
- 12 ÷ 4 = 3 → too small
✔ Answer: –
---
2. 23 □ 5 = 28
What operation turns 23 and 5 into 28?
- 23 + 5 =
28 ✔
- Others: 23–5=18, 23×5=115, 23÷5=4.6 — none work
✔ Answer: +
---
3. 2 □ 7 = 14
What operation turns 2 and 7 into 14?
- 2 + 7 = 9
- 2 – 7 = -5
- 2 × 7 =
14 ✔
- 2 ÷ 7 ≈ 0.28 — nope
✔ Answer: ×
---
4. 8 □ 2 = 4
What operation turns 8 and 2 into 4?
- 8 + 2 = 10
- 8 – 2 = 6
- 8 × 2 = 16
- 8 ÷ 2 =
4 ✔
✔ Answer: ÷
---
5. 5 □ 8 = 40
What operation turns 5 and 8 into 40?
- 5 + 8 = 13
- 5 – 8 = -3
- 5 × 8 =
40 ✔
- 5 ÷ 8 = 0.625 — nope
✔ Answer: ×
---
6. 13 □ 7 = 6
What operation turns 13 and 7 into 6?
- 13 + 7 = 20
- 13 – 7 =
6 ✔
- 13 × 7 = 91
- 13 ÷ 7 ≈ 1.85 — nope
✔ Answer: –
---
7. 70 □ 10 = 80
What operation turns 70 and 10 into 80?
- 70 + 10 =
80 ✔
- Others: 70–10=60, 70×10=700, 70÷10=7 — nope
✔ Answer: +
---
8. 10 □ 3 = 30
What operation turns 10 and 3 into 30?
- 10 + 3 = 13
- 10 – 3 = 7
- 10 × 3 =
30 ✔
- 10 ÷ 3 ≈ 3.33 — nope
✔ Answer: ×
---
9. 45 □ 5 = 9
What operation turns 45 and 5 into 9?
- 45 + 5 = 50
- 45 – 5 = 40
- 45 × 5 = 225
- 45 ÷ 5 =
9 ✔
✔ Answer: ÷
---
10. 80 □ 50 = 30
What operation turns 80 and 50 into 30?
- 80 + 50 = 130
- 80 – 50 =
30 ✔
- 80 × 50 = 4000
- 80 ÷ 50 = 1.6 — nope
✔ Answer: –
---
11. 7 □ 10 = 70
What operation turns 7 and 10 into 70?
- 7 + 10 = 17
- 7 – 10 = -3
- 7 × 10 =
70 ✔
- 7 ÷ 10 = 0.7 — nope
✔ Answer: ×
---
12. 6 □ 14 = 20
What operation turns 6 and 14 into 20?
- 6 + 14 =
20 ✔
- Others: 6–14=-8, 6×14=84, 6÷14≈0.43 — nope
✔ Answer: +
---
13. 8 □ 8 = 16
What operation turns 8 and 8 into 16?
- 8 + 8 =
16 ✔
- 8 – 8 = 0
- 8 × 8 = 64
- 8 ÷ 8 = 1 — nope
✔ Answer: +
---
14. 60 □ 5 = 12
What operation turns 60 and 5 into 12?
- 60 + 5 = 65
- 60 – 5 = 55
- 60 × 5 = 300
- 60 ÷ 5 =
12 ✔
✔ Answer: ÷
---
15. 11 □ 9 = 2
What operation turns 11 and 9 into 2?
- 11 + 9 = 20
- 11 – 9 =
2 ✔
- 11 × 9 = 99
- 11 ÷ 9 ≈ 1.22 — nope
✔ Answer: –
---
16. 16 □ 4 = 12
What operation turns 16 and 4 into 12?
- 16 + 4 = 20
- 16 – 4 =
12 ✔
- 16 × 4 = 64
- 16 ÷ 4 = 4 — nope
✔ Answer: –
---
17. 24 □ 2 = 12
What operation turns 24 and 2 into 12?
- 24 + 2 = 26
- 24 – 2 = 22
- 24 × 2 = 48
- 24 ÷ 2 =
12 ✔
✔ Answer: ÷
---
18. 5 □ 2 = 10
What operation turns 5 and 2 into 10?
- 5 + 2 = 7
- 5 – 2 = 3
- 5 × 2 =
10 ✔
- 5 ÷ 2 = 2.5 — nope
✔ Answer: ×
---
##
✔ Final Answers:
1.
–
2.
+
3.
×
4.
÷
5.
×
6.
–
7.
+
8.
×
9.
÷
10.
–
11.
×
12.
+
13.
+
14.
÷
15.
–
16.
–
17.
÷
18.
×
---
You can now fill these into your worksheet! 😊
This exercise helps reinforce understanding of basic operations and how they relate numbers. Great practice for mental math!
Parent Tip: Review the logic above to help your child master the concept of missing symbol worksheet.
