Sir, I Don't Get It... But I Get It
Monday, March 12, 2007
Review: Addition and Subtraction of Fractions (You need this)
1.
1
8
+
1
2
=
2.
4
5
+
6
10
=
3.
1
2
+
3
9
=
4.
8
9
+
1
3
=
5.
5
7
+
1
2
=
6.
1
4
+
9
12
=
7.
4
6
+
1
2
=
8.
5
8
+
2
4
=
9.
3
6
+
3
12
=
10.
2
4
+
1
2
=
11.
1
2
+
2
4
=
12.
4
7
+
1
2
=
13.
3
9
+
1
3
=
14.
1
5
+
8
10
=
15.
1
3
+
4
5
=
16.
2
8
+
1
4
=
17.
3
4
+
1
2
=
18.
4
5
+
1
2
=
19.
5
9
+
2
3
=
20.
2
3
+
3
9
=
21.
5
6
+
6
12
=
22.
1
2
+
4
8
=
23.
3
5
+
1
2
=
24.
1
4
+
1
2
=
25.
4
9
+
1
2
=
26.
2
3
+
3
4
=
27.
6
8
+
1
2
=
28.
3
7
+
1
2
=
29.
5
6
+
1
2
=
30.
1
2
+
7
12
=
31.
3
4
+
11
12
=
32.
1
2
+
10
12
=
33.
1
3
+
1
6
=
34.
2
7
+
1
2
=
35.
1
5
+
1
3
=
36.
4
6
+
9
12
=
37.
2
9
+
3
6
=
38.
5
9
+
4
6
=
39.
3
6
+
6
9
=
40.
1
2
+
5
6
=
1.
3
5
-
1
2
=
2.
6
9
-
1
2
=
3.
1
2
-
1
3
=
4.
6
7
-
1
2
=
5.
1
2
-
2
10
=
6.
1
2
-
2
6
=
7.
2
4
-
1
3
=
8.
8
9
-
1
3
=
9.
9
12
-
1
2
=
10.
5
8
-
1
2
=
11.
4
6
-
1
2
=
12.
2
5
-
2
10
=
13.
5
6
-
1
4
=
14.
2
3
-
1
2
=
15.
4
6
-
1
3
=
16.
6
9
-
3
6
=
17.
5
7
-
1
2
=
18.
3
4
-
6
8
=
19.
4
5
-
1
3
=
20.
4
8
-
1
4
=
21.
1
2
-
2
7
=
22.
2
4
-
5
12
=
23.
8
9
-
3
6
=
24.
4
6
-
2
3
=
25.
9
10
-
4
5
=
26.
1
2
-
3
9
=
27.
5
8
-
2
4
=
28.
1
2
-
1
8
=
29.
3
4
-
1
2
=
30.
2
3
-
7
12
=
31.
4
6
-
1
9
=
32.
4
5
-
5
10
=
33.
4
5
-
1
2
=
34.
8
9
-
1
6
=
35.
8
9
-
2
3
=
36.
1
4
-
3
12
=
37.
1
2
-
4
8
=
38.
1
2
-
3
8
=
39.
5
12
-
1
4
=
40.
5
9
-
1
2
=
1.
5
6
+
3
12
=
2.
1
2
-
3
7
=
3.
1
4
-
2
12
=
4.
4
5
+
5
10
=
5.
7
8
+
3
4
=
6.
2
9
+
1
2
=
7.
7
12
-
1
2
=
8.
2
4
-
1
3
=
9.
1
2
+
2
3
=
10.
1
2
-
4
9
=
11.
3
10
-
1
5
=
12.
6
8
+
1
2
=
13.
4
5
-
1
3
=
14.
4
6
+
7
9
=
15.
2
5
+
2
3
=
16.
2
3
+
5
6
=
17.
3
4
-
4
8
=
18.
2
3
-
1
2
=
19.
5
9
-
1
2
=
20.
4
7
+
1
2
=
21.
5
9
-
2
6
=
22.
3
5
+
2
3
=
23.
5
6
-
1
4
=
24.
8
9
+
2
3
=
25.
2
3
-
3
5
=
26.
3
8
+
1
4
=
27.
1
6
+
1
2
=
28.
5
7
-
1
2
=
29.
1
2
+
5
6
=
30.
7
8
-
2
4
=
31.
4
5
+
1
2
=
32.
8
12
-
3
6
=
33.
2
3
-
4
6
=
34.
1
4
+
5
8
=
35.
1
2
+
1
6
=
36.
7
9
+
1
2
=
37.
6
7
-
1
2
=
38.
4
9
-
2
6
=
39.
3
7
+
1
2
=
40.
2
3
-
1
12
=
1.
1
2
-
1
6
=
2.
2
2
3
+
4
1
2
=
3.
1
6
8
+
1
2
=
4.
3
5
7
-
2
1
2
=
5.
5
2
4
-
1
3
6
=
6.
4
3
5
+
3
5
10
=
7.
6
2
3
-
6
1
2
=
8.
2
1
2
+
5
1
5
=
9.
3
4
9
-
1
1
2
=
10.
6
1
3
+
2
6
9
=
11.
4
3
4
+
6
7
12
=
12.
5
10
-
2
5
=
13.
1
4
7
+
4
1
2
=
14.
7
8
-
2
4
=
15.
2
5
6
-
1
1
3
=
16.
3
1
2
+
4
3
5
=
17.
1
1
7
+
1
2
=
18.
7
8
-
1
4
=
19.
6
2
4
-
2
5
6
=
20.
3
4
5
+
1
1
2
=
21.
2
5
9
+
6
2
3
=
22.
4
8
12
-
4
3
6
=
23.
5
2
3
+
2
7
9
=
24.
3
5
6
-
3
9
=
25.
5
1
2
-
3
5
6
=
26.
6
1
3
+
1
1
2
=
27.
1
2
4
-
1
2
=
28.
4
3
9
+
4
1
6
=
29.
5
7
+
1
1
2
=
30.
2
1
5
-
1
7
10
=
31.
4
7
8
-
2
2
4
=
32.
3
3
9
+
5
1
2
=
33.
6
1
2
-
6
7
=
34.
1
6
7
+
4
1
2
=
35.
5
8
-
1
4
=
36.
2
2
5
+
3
1
2
=
37.
3
4
+
1
2
=
38.
4
1
3
-
1
1
2
=
39.
2
3
6
-
1
3
9
=
40.
1
6
7
+
3
1
2
=
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