Printable primary math worksheet for math grades 1 to 6 based on ... - Free Printable

Let's solve the problem step by step.

We are asked to find the average of each set of numbers. The average (also known as the mean) is calculated using the formula:

$$
\text{Average} = \frac{\text{Sum of all numbers}}{\text{Number of numbers}}
$$

We'll go through each set one by one.

---

Set 1: 78, 29, 120, 34, 59

- Sum: $78 + 29 + 120 + 34 + 59 = 320$
- Count: 5
- Average: $ \frac{320}{5} = 64 $

✔ 64

---

Set 2: 62, 56, 30, 50, 42

- Sum: $62 + 56 + 30 + 50 + 42 = 240$
- Count: 5
- Average: $ \frac{240}{5} = 48 $

✔ 48

---

Set 3: 17, 55, 80, 67, 91

- Sum: $17 + 55 + 80 + 67 + 91 = 310$
- Count: 5
- Average: $ \frac{310}{5} = 62 $

✔ 62

---

Set 4: 51, 19, 60, 22, 48

- Sum: $51 + 19 + 60 + 22 + 48 = 200$
- Count: 5
- Average: $ \frac{200}{5} = 40$

✔ 40

---

Set 5: 200, 71, 82, 125, 42

- Sum: $200 + 71 + 82 + 125 + 42 = 520$
- Count: 5
- Average: $ \frac{520}{5} = 104$

✔ 104

---

Set 6: 55, 52, 25, 150, 178

- Sum: $55 + 52 + 25 + 150 + 178 = 460$
- Count: 5
- Average: $ \frac{460}{5} = 92$

✔ 92

---

Set 7: 32, 47, 118, 71

- Sum: $32 + 47 + 118 + 71 = 268$
- Count: 4
- Average: $ \frac{268}{4} = 67$

✔ 67

---

Set 8: 12, 79, 90, 85, 69

- Sum: $12 + 79 + 90 + 85 + 69 = 435$
- Count: 5
- Average: $ \frac{435}{5} = 87$

✔ 87

---

Set 9: 26, 28, 25, 24, 22

- Sum: $26 + 28 + 25 + 24 + 22 = 125$
- Count: 5
- Average: $ \frac{125}{5} = 25$

✔ 25

---

Set 10: 20, 24, 19, 25, 22

- Sum: $20 + 24 + 19 + 25 + 22 = 110$
- Count: 5
- Average: $ \frac{110}{5} = 22$

✔ 22

---

Set 11: 100, 50, 40, 30, 35

- Sum: $100 + 50 + 40 + 30 + 35 = 255$
- Count: 5
- Average: $ \frac{255}{5} = 51$

✔ 51

---

Set 12: 90, 110, 70, 130

- Sum: $90 + 110 + 70 + 130 = 400$
- Count: 4
- Average: $ \frac{400}{4} = 100$

✔ 100

---

✔ Final Answers:

| Set | Numbers | Average |
|-----|--------|--------|
| 1 | 78, 29, 120, 34, 59 | 64 |
| 2 | 62, 56, 30, 50, 42 | 48 |
| 3 | 17, 55, 80, 67, 91 | 62 |
| 4 | 51, 19, 60, 22, 48 | 40 |
| 5 | 200, 71, 82, 125, 42 | 104 |
| 6 | 55, 52, 25, 150, 178 | 92 |
| 7 | 32, 47, 118, 71 | 67 |
| 8 | 12, 79, 90, 85, 69 | 87 |
| 9 | 26, 28, 25, 24, 22 | 25 |
| 10 | 20, 24, 19, 25, 22 | 22 |
| 11 | 100, 50, 40, 30, 35 | 51 |
| 12 | 90, 110, 70, 130 | 100 |

---

Let me know if you'd like this formatted for printing or a worksheet!