Final answer:
Adding units of time involves combining like units and simplifying when necessary, such as converting minutes to hours or seconds to minutes. Conversion involves multiplication or division depending on the direction of the conversion, like seconds to minutes or hours to minutes.
Step-by-step explanation:
Adding and converting units of time are fundamental skills in mathematics, often reviewed at the middle school level. When adding units of time, it's essential to combine like units first, such as seconds with seconds, minutes with minutes, and hours with hours. After performing the addition, you may need to simplify the result by converting excess minutes into hours or seconds into minutes as appropriate.
For example:
- To add 15 minutes plus 60 minutes, you get 75 minutes, which simplifies to 1 hour and 15 minutes.
- Adding 10 minutes to 20 minutes results in 30 minutes.
- Adding 15 seconds to 45 seconds equals 60 seconds, which simplifies to 1 minute.
When converting units of time, divide or multiply to change seconds to minutes, minutes to hours, and vice versa. For example:
- Convert 120 seconds to minutes by dividing by 60, which equals 2 minutes.
- Convert 4 hours to minutes by multiplying by 60, resulting in 240 minutes.