Which is the biggest number? 1. 4 × 10−8 2. 4 × 10−18 3. 3.0 × 10−18 4. 3 × 10−8?

1. 40-8=32
2. 40-18=22
3. 30-18=12
4. 30-8= 22

#1 is the largest

1. 4x10-8
2.4x10-18
3.0x10-18
4.3x10-8

1. You must do
4x10=40 first (according to "B.O.D.M.A.S")
then - 8 which is                                                 32

2. You must do
4x10=40 (again)
then - 18 which is                                               22

3. You must do
0x10=0 
then - 18 which is                                               -18  (Aka negative 18)

4.You must do
3x10=30 
then - 8 which is                                                 22

Lets review what we have:

1.   32
2.  22
3. -18
4.  22

The biggest would be 1