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๐Ÿš€ Measurement of time is essential for understanding how long events last and how to schedule activities. Time is measured in hours, minutes, and seconds. A time interval is the difference between two times, and we often need to convert between hours, minutes, and seconds to understand these intervals better. For example, 1 hour is equal to 60 minutes, and 1 minute is equal to 60 seconds. This means that to convert time across these units, we can multiply or divide by 60 depending on whether we are converting to a larger or smaller unit.

Theory Explanation

Understanding Time Units

Time is divided into three main units: hours, minutes, and seconds. 1 hour equals 60 minutes, and 1 minute equals 60 seconds. This relationship is crucial for converting between these units.

Converting Hours to Minutes

To convert hours to minutes, multiply the number of hours by 60. For example, 2 hours is 2 x 60 = 120 minutes.

\[ \text{Minutes} = \text{Hours} \times 60 \]
Converting Minutes to Seconds

To convert minutes to seconds, multiply the number of minutes by 60. For example, 3 minutes is 3 x 60 = 180 seconds.

\[ \text{Seconds} = \text{Minutes} \times 60 \]
Converting Minutes to Hours

To convert minutes back to hours, divide the number of minutes by 60. For example, 120 minutes is 120 รท 60 = 2 hours.

\[ \text{Hours} = \frac{\text{Minutes}}{60} \]
Converting Seconds to Minutes

To convert seconds to minutes, divide the number of seconds by 60. For example, 120 seconds is 120 รท 60 = 2 minutes.

\[ \text{Minutes} = \frac{\text{Seconds}}{60} \]

Key Points

  • ๐ŸŽฏ 1 hour = 60 minutes
  • ๐ŸŽฏ 1 minute = 60 seconds
  • ๐ŸŽฏ To convert larger units to smaller units, multiply
  • ๐ŸŽฏ To convert smaller units to larger units, divide
  • ๐ŸŽฏ Understanding these conversions helps in calculating time intervals.

Examples:💡

Convert 3 hours to minutes.

Solution:

Step 1: Multiply the number of hours by 60: 3 x 60 = 180 minutes.

\[ 3 \times 60 = 180 \]

Convert 150 minutes to hours.

Solution:

Step 1: Divide the number of minutes by 60: 150 รท 60 = 2.5 hours.

\[ \frac{150}{60} = 2.5 \]

Convert 120 seconds to minutes.

Solution:

Step 1: Divide the number of seconds by 60: 120 รท 60 = 2 minutes.

\[ \frac{120}{60} = 2 \]

Common Mistakes

  • Mistake: Confusing hours and minutes when converting.

    Correction: Always remember that 1 hour equals 60 minutes. Use this relationship to guide your conversions.

  • Mistake: Forgetting to multiply or divide by 60 when converting.

    Correction: Write down the conversion factors (60 for hours to minutes and minutes to seconds) to avoid mistakes.

  • Mistake: Not checking if the answer makes sense (e.g., getting a negative time).

    Correction: Always review your calculations to ensure they are logical and correct.