You’ve uploaded a worksheet titled
“Average of 3 Numbers”. The task is to find the average (also called the
mean) of each set of three numbers.
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✔ How to Find the Average of 3 Numbers:
1.
Add the three numbers together.
2.
Divide the sum by 3.
3. That’s your average!
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Let’s solve each row one by one:
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🔹 Row 1:
-
4, 5, 6 → (4 + 5 + 6) ÷ 3 = 15 ÷ 3 =
5
-
5, 9, 10 → (5 + 9 + 10) ÷ 3 = 24 ÷ 3 =
8
-
8, 7, 6 → (8 + 7 + 6) ÷ 3 = 21 ÷ 3 =
7
✔ Answers:
5, 8, 7
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🔹 Row 2:
-
10, 20, 30 → (10 + 20 + 30) ÷ 3 = 60 ÷ 3 =
20
-
3, 10, 17 → (3 + 10 + 17) ÷ 3 = 30 ÷ 3 =
10
-
8, 7, 6 → Already done →
7
✔ Answers:
20, 10, 7
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🔹 Row 3:
-
12, 20, 1 → (12 + 20 + 1) ÷ 3 = 33 ÷ 3 =
11
-
10, 5, 15 → (10 + 5 + 15) ÷ 3 = 30 ÷ 3 =
10
-
15, 20, 25 → (15 + 20 + 25) ÷ 3 = 60 ÷ 3 =
20
✔ Answers:
11, 10, 20
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🔹 Row 4:
-
18, 12, 6 → (18 + 12 + 6) ÷ 3 = 36 ÷ 3 =
12
-
14, 6, 16 → (14 + 6 + 16) ÷ 3 = 36 ÷ 3 =
12
-
15, 15, 12 → (15 + 15 + 12) ÷ 3 = 42 ÷ 3 =
14
✔ Answers:
12, 12, 14
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🔹 Row 5:
-
2, 12, 22 → (2 + 12 + 22) ÷ 3 = 36 ÷ 3 =
12
-
12, 18, 30 → (12 + 18 + 30) ÷ 3 = 60 ÷ 3 =
20
-
20, 30, 40 → (20 + 30 + 40) ÷ 3 = 90 ÷ 3 =
30
✔ Answers:
12, 20, 30
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🔹 Row 6:
-
16, 22, 22 → (16 + 22 + 22) ÷ 3 = 60 ÷ 3 =
20
-
17, 22, 21 → (17 + 22 + 21) ÷ 3 = 60 ÷ 3 =
20
-
19, 21, 20 → (19 + 21 + 20) ÷ 3 = 60 ÷ 3 =
20
✔ Answers:
20, 20, 20
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## 📋 Final Answer Key (by row):
Row 1: 5, 8, 7
Row 2: 20, 10, 7
Row 3: 11, 10, 20
Row 4: 12, 12, 14
Row 5: 12, 20, 30
Row 6: 20, 20, 20
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💡
Tip: Notice that if all three numbers are the same (like 20,20,20), the average is obviously that number. Also, if they’re evenly spaced (like 10,20,30), the middle number is the average!
Let me know if you’d like this in a printable format or need help explaining it to a student! 😊
Parent Tip: Review the logic above to help your child master the concept of average worksheet.
