WEBVTT
00:00:01.772 --> 00:00:06.312
One hour and 30 minutes is what minutes.
00:00:07.202 --> 00:00:11.032
Think: How many minutes are in one hour?
00:00:12.392 --> 00:00:15.062
In this question, we’re shown a part–whole model.
00:00:15.832 --> 00:00:19.492
The whole amount is one hour and 30 minutes.
00:00:20.312 --> 00:00:26.102
We know that the first part is one hour and the second part is 30 minutes.
00:00:26.722 --> 00:00:31.952
In this question, we have to work out how many minutes there are in one hour and 30 minutes.
00:00:32.862 --> 00:00:37.892
We’re only given one of the parts in the part–whole model, the 30 minutes.
00:00:38.402 --> 00:00:44.962
To work out how many minutes are in the other part, we need to think about how many minutes there are in an hour.
00:00:46.042 --> 00:00:48.252
There are 60 minutes in one hour.
00:00:48.822 --> 00:01:08.992
Five, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60.
00:01:09.852 --> 00:01:16.282
Now, what we need to do is add together the two parts, 60 and 30.
00:01:17.092 --> 00:01:23.392
We know that six plus three is nine and six 10s plus three 10s is nine 10s.
00:01:23.802 --> 00:01:25.592
Nine 10s are 90.
00:01:26.212 --> 00:01:29.062
60 plus 30 is 90.
00:01:30.152 --> 00:01:34.322
One hour and 30 minutes is 90 minutes.