WEBVTT

1
00:00:00.000 --> 00:00:05.352
Here is the problem: 18 plus (10 minus 1) / 9 minus 5.

2
00:00:05.802 --> 00:00:09.738
Exact arithmetic with fractions (results kept in lowest terms).

3
00:00:10.538 --> 00:00:12.291
Subtract the whole numbers.

4
00:00:12.741 --> 00:00:16.503
Dividing by a fraction means multiplying by its reciprocal.

5
00:00:16.953 --> 00:00:20.215
Multiply numerators and multiply denominators.

6
00:00:20.665 --> 00:00:25.263
Simplify. Divide numerator and denominator by their GCF, 9.

7
00:00:26.063 --> 00:00:27.236
Add the whole numbers.

8
00:00:27.686 --> 00:00:29.439
Subtract the whole numbers.

9
00:00:29.889 --> 00:00:31.990
Final answer in lowest terms.

10
00:00:32.790 --> 00:00:34.566
So the answer is 14.

11
00:00:35.016 --> 00:00:47.915
Fractions are combined over a common denominator for addition and subtraction, multiplied straight across, and divided by multiplying by the reciprocal. The result is reduced by the greatest common factor.

12
00:00:48.715 --> 00:00:51.687
Decimal check: 14 approximately 14.