Adding Time Clock Math
Select add or subtract.
Adding time clock math. Enter the number of hours and or minutes you wish to add to or subtract from the clock time. Subtract the hours subtract the minutes if the minutes are negative add 60 to the minutes and subtract 1 from hours. Adding and subtracting time is similar to adding any numbers but the regrouping amounts are different. One of the most important skills when dealing with time is to be able to calculate a time in the futre by adding a number of minutes to the current time.
If the hours are 0 add 24 and set it to hours mod 24. Keep pace with time and move up the ladder practicing another operation. Learn how to tell time with clocks with this fun math arcade game. The minutes entered must be a positive number or zero 0.
In time values the places have different values based on an ancient babylonian numbering system with a base of 60. Subtracting hours and minutes without regrouping. Add or subtract hours and or minutes enter first hours and minutes from enter second hours and minutes below from when you subtract the greater number of hours and minutes should be entered first. Use this calculator to add or subtract time days hours minutes seconds from a starting time and date.
The beginning worksheets in this section start with times from the full hour and they are the easiest of the bunch. These worksheets require students to determine the current time by looking at an analog watch face and then adding a certain number of minutes to it to get the future time. The calculated clock time will appear. To calculate the amount of time days hours minutes seconds between times on two different dates use the time duration calculator.
These worksheets start out with times that are within the starting hour but later worksheets require calculating times that cross the hour boundary so that the addition requires calculating the minutes required to fill the current hour and then the remaining minutes that carry over into the following hour to get the final time. If the number of hours is greater than 24 hours goto. Adding and subtracting time. Add or subtract time from a date.
Ones tens hundreds etc. Subtract the hours and the minutes separately. The result will be the new time and date based on the subtracted or added period of time. Convert the time back to 12 hour format at the end of calculation.
If you think of the decimal system numbers are divided into places named. The hours entered must be a positive number or zero 0. This is the full level of complexity for the adding time worksheets dealing with adding minutes to times read from an analog clock fact at five minute intervals.