adding and subtracting decimals
dividing fractions
find the L.c.m. and G.c.f.
simplifying fractions
find the median
100
369.123 + 000.583
369.706
100
1                   3

---        /      ----     

3                   5

5
100
G.C.F of 30 and 60
30
100
10

-----

40

1

---

4

100
28,100,6,96
96
200
45.24 + 63.0
108.24
200
2                 2

---     \        ---

5                5

1
200
L.C.M of 30 and 60
120
200
64

---

120

8

---

15

200
60,80,50,28
60
300
96.78 - 3.45
93.33
300
20           2

---   /     ----

40         4

7.5
300
G.C.F of 20 and 40 
20
300
10

----

30

1

---

3

300
9,12,6,8,9,15
9
400
93.33 - 36.45
56.88
400
2                   5

----     \         ----

5                  10

20/25
400
L.C.M of 20 and 40
100
400
9

----

24

3

----

8

400
96,100,84,75,99,100
96
500
480.478 + 36.8741
517.3521
500
6                  5

----       /     -----

30                4

4
500

What does L.C.M & G.C.F means 

Least common multiple and Greatest Common Factor

500
48

---

120

2

---

5

500
500,6,2
6
M
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