1
00:00:00,000 --> 00:00:01,772
Thirty times thirty.

2
00:00:02,133 --> 00:00:05,753
Split the second thirty into ten times three.

3
00:00:06,066 --> 00:00:09,278
Associative property. Move the parentheses.

4
00:00:09,600 --> 00:00:13,052
Split the first thirty into three times ten.

5
00:00:13,400 --> 00:00:16,780
Associative property. Group the tens together.

6
00:00:17,133 --> 00:00:20,897
Ten times ten equals one hundred.

7
00:00:21,200 --> 00:00:24,964
Commutative property. Swap three and one hundred.

8
00:00:25,266 --> 00:00:29,846
Associative property. Three times three equals nine.

9
00:00:30,200 --> 00:00:33,964
One hundred times nine equals nine hundred.

10
00:00:34,266 --> 00:00:38,366
So thirty times thirty equals nine hundred.