103 or 1000
1
6.3333333 x 10^20
6,215/10-2 = 6.215/(1/102) = 6,215 x 102 = 621,500
-90
8.2 x 102 ÷ 6.3 x 104 ≈ 1.302 x 10-2
0.6
0
when dividing a number to a certain power by the same number to a different power, subtract the exponents 6 to the 6 divided by 6 to the 2 = 6 to the 4 power = 1296
10
0.1
10 000 divided by 1000 is 10.