0
Convert 20 minutes into seconds (20 * 60). There are sixty seconds in a minute. This would make 1200 seconds. Then add the 45 seconds (1245). Convert 30 minutes (1/2 an hour) into seconds (30 * 60). Then subtract 1245 from 1800. This would leave 555 seconds or 9 minutes, 15 seconds. I hope this helps.
Still curious? Ask our experts.
Chat with our AI personalities
RafaThere's no fun in playing it safe. Why not try something a little unhinged?
Chat with Rafa
CoachSuccess isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach
MaxineI respect you enough to keep it real.
Chat with MaxineAdd your answer:
Earn +20 ptsQ: How do you subtract 20 mins. 45 seconds from one half hour?
Write your answer...
Submit
Still have questions?
Continue Learning about Other Math
What fraction is 19 seconds of an hour?
There are 60 seconds in a min. and 60 mins. in an hour = 3600 seconds in an hour. 19 seconds is therefore 19/3600 of and hour.
What is half of 7 minutes and 24 seconds?
3 mins and 42 seconds
Is 1 in a half hour is 50 mins?
No.
The number of eggs in a basket double every minute the basket is full in half an hour when was it half full?
29 mins, because at 30 mins it will have doubled the amount at 29 mins, making 29 mins halfway. it is NOT 30 mins!!
What is 20 mins. after 645 pm?
Half an hour before 12 noon
Trending Questions
What is 50 squared?
What is 124-84?
What is each exterior angle measure of a regular quadrilateral?
What is the answer to 4 divided by 572?
How is 18 divided by 4 4.5?
What is 48.6 divided by 6?
5.673 times 10 to the negative 8 times63 times 15 equals?
Which fraction is equivalent to 0.25?
What is half of seven-eighths?
How many oz is 400 mls?
What is 714 rounded to the nearest hundred?
64 as a fraction in simplest form?
One fourth plus one fourth equals?
What 2 numbers have a sum of 48 and a difference of 12?
What is three-quarters of 64?
What is 70percent of 30?
How many times can 20 go into 48000?
How do you write 2 ten thousands?
What is 7 in binary form?
How did Archimedes discover pi?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.