# Question Video: Converting Hours and Minutes to Minutes Mathematics

1 hour and 30 minutes is ＿ minutes. Think: How many minutes are in 1 hour?

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### Video Transcript

One hour and 30 minutes is what minutes. Think: How many minutes are in one hour?

In this question, we’re shown a part–whole model. The whole amount is one hour and 30 minutes. We know that the first part is one hour and the second part is 30 minutes. In this question, we have to work out how many minutes there are in one hour and 30 minutes. We’re only given one of the parts in the part–whole model, the 30 minutes.

To work out how many minutes are in the other part, we need to think about how many minutes there are in an hour. There are 60 minutes in one hour. Five, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60. Now, what we need to do is add together the two parts, 60 and 30. We know that six plus three is nine and six 10s plus three 10s is nine 10s. Nine 10s are 90. 60 plus 30 is 90. One hour and 30 minutes is 90 minutes.