Practice 2 worksheet on converting hours to minutes with examples and a reference guide.

Problem: Conversion of Hours and Minutes

The task is to convert given times from hours and minutes into total minutes. Here's how we solve each part step by step.

#### Step 1: Understand the conversion
- 1 hour = 60 minutes
- To convert a time given in hours and minutes into total minutes:
- Multiply the number of hours by 60.
- Add the number of minutes.

#### Solutions:

---

#### (a) 1 h 20 min
1. Convert 1 hour to minutes:
\[
1 \text{ h} = 1 \times 60 = 60 \text{ min}
\]
2. Add the extra 20 minutes:
\[
60 \text{ min} + 20 \text{ min} = 80 \text{ min}
\]

Answer:
\[
1 \text{ h } 20 \text{ min} = 60 \text{ min} + 20 \text{ min} = 80 \text{ min}
\]

---

#### (b) 2 h 48 min
1. Convert 2 hours to minutes:
\[
2 \text{ h} = 2 \times 60 = 120 \text{ min}
\]
2. Add the extra 48 minutes:
\[
120 \text{ min} + 48 \text{ min} = 168 \text{ min}
\]

Answer:
\[
2 \text{ h } 48 \text{ min} = 120 \text{ min} + 48 \text{ min} = 168 \text{ min}
\]

---

#### (c) 1 h 40 min
1. Convert 1 hour to minutes:
\[
1 \text{ h} = 1 \times 60 = 60 \text{ min}
\]
2. Add the extra 40 minutes:
\[
60 \text{ min} + 40 \text{ min} = 100 \text{ min}
\]

Answer:
\[
1 \text{ h } 40 \text{ min} = 60 \text{ min} + 40 \text{ min} = 100 \text{ min}
\]

---

#### (d) 2 h 25 min
1. Convert 2 hours to minutes:
\[
2 \text{ h} = 2 \times 60 = 120 \text{ min}
\]
2. Add the extra 25 minutes:
\[
120 \text{ min} + 25 \text{ min} = 145 \text{ min}
\]

Answer:
\[
2 \text{ h } 25 \text{ min} = 145 \text{ min}
\]

---

#### (e) 3 h 33 min
1. Convert 3 hours to minutes:
\[
3 \text{ h} = 3 \times 60 = 180 \text{ min}
\]
2. Add the extra 33 minutes:
\[
180 \text{ min} + 33 \text{ min} = 213 \text{ min}
\]

Answer:
\[
3 \text{ h } 33 \text{ min} = 213 \text{ min}
\]

---

#### (f) 4 h 5 min
1. Convert 4 hours to minutes:
\[
4 \text{ h} = 4 \times 60 = 240 \text{ min}
\]
2. Add the extra 5 minutes:
\[
240 \text{ min} + 5 \text{ min} = 245 \text{ min}
\]

Answer:
\[
4 \text{ h } 5 \text{ min} = 245 \text{ min}
\]

---

#### (g) 5 h 50 min
1. Convert 5 hours to minutes:
\[
5 \text{ h} = 5 \times 60 = 300 \text{ min}
\]
2. Add the extra 50 minutes:
\[
300 \text{ min} + 50 \text{ min} = 350 \text{ min}
\]

Answer:
\[
5 \text{ h } 50 \text{ min} = 350 \text{ min}
\]

---

#### (h) 3 h 16 min
1. Convert 3 hours to minutes:
\[
3 \text{ h} = 3 \times 60 = 180 \text{ min}
\]
2. Add the extra 16 minutes:
\[
180 \text{ min} + 16 \text{ min} = 196 \text{ min}
\]

Answer:
\[
3 \text{ h } 16 \text{ min} = 196 \text{ min}
\]

---

#### (i) 6 h 30 min
1. Convert 6 hours to minutes:
\[
6 \text{ h} = 6 \times 60 = 360 \text{ min}
\]
2. Add the extra 30 minutes:
\[
360 \text{ min} + 30 \text{ min} = 390 \text{ min}
\]

Answer:
\[
6 \text{ h } 30 \text{ min} = 390 \text{ min}
\]

---

#### (j) 5 h 9 min
1. Convert 5 hours to minutes:
\[
5 \text{ h} = 5 \times 60 = 300 \text{ min}
\]
2. Add the extra 9 minutes:
\[
300 \text{ min} + 9 \text{ min} = 309 \text{ min}
\]

Answer:
\[
5 \text{ h } 9 \text{ min} = 309 \text{ min}
\]

---

Final Answers:

\[
\boxed{
\begin{aligned}
&\text{(a)} \ 80 \text{ min} \\
&\text{(b)} \ 168 \text{ min} \\
&\text{(c)} \ 100 \text{ min} \\
&\text{(d)} \ 145 \text{ min} \\
&\text{(e)} \ 213 \text{ min} \\
&\text{(f)} \ 245 \text{ min} \\
&\text{(g)} \ 350 \text{ min} \\
&\text{(h)} \ 196 \text{ min} \\
&\text{(i)} \ 390 \text{ min} \\
&\text{(j)} \ 309 \text{ min}
\end{aligned}
}
\]