WEBVTT 00:00:04.500 --> 00:00:08.860 I took my blocks and built two walls. 00:00:09.360 --> 00:00:14.060 In each wall one block was one fourth of them all. 00:00:15.380 --> 00:00:19.640 Two divided by one fourth equals eight; 00:00:20.500 --> 00:00:24.960 eight blocks to build the wall at my castle gate. 00:00:26.540 --> 00:00:30.640 To divide a whole number by a fraction we start 00:00:32.240 --> 00:00:36.340 by dividing the whole number into fractional parts. 00:00:37.780 --> 00:00:42.620 Then count the number of fractional parts present; 00:00:43.760 --> 00:00:47.720 and that will be the quotient. 00:00:48.960 --> 00:00:54.960 Then I took my blocks and built three seats. 00:00:55.200 --> 00:00:59.899 One block was one fifth of each. 00:00:59.899 --> 00:01:04.999 Three divided by one fifth equals fifteen; 00:01:05.000 --> 00:01:10.240 that’s how many blocks it took to build my seats. 00:01:11.280 --> 00:01:16.160 To divide a whole number by a fraction we start 00:01:16.580 --> 00:01:21.260 by dividing the whole number into fractional parts. 00:01:22.220 --> 00:01:27.120 Then count the number of fractional parts present; 00:01:28.400 --> 00:01:32.880 and that will be the quotient. 00:01:33.920 --> 00:01:36.640 When there’s a fraction we want to divide by, 00:01:36.670 --> 00:01:38.909 we can flip the fraction and multiply. 00:01:38.909 --> 00:01:41.500 Think of three divided by one fifth: 00:01:41.500 --> 00:01:44.369 we’ll get the same answer if we multiply and flip. 00:01:44.369 --> 00:01:47.649 So these expressions are equal, and we call 00:01:47.680 --> 00:01:50.560 five over one, one-fifth's reciprocal. 00:01:50.560 --> 00:01:55.760 To divide a whole number by a fraction we start 00:01:55.760 --> 00:02:01.040 by dividing the whole number into fractional parts. 00:02:01.360 --> 00:02:07.440 Then count the number of fractional parts present; 00:02:07.440 --> 00:02:11.700 and that will be the quotient.