Move the decimal point 6 places to the left from the end of 189000 to give 0.189000 which is 0.189
1
6.3333333 x 10^20
10 to the 8th power divided by 10 to the 7th power is 10
10 to the power 8 divided by 10 to the power of 6 is 10 to the power of (8 - 2) which is 10 to the power of 2 or 100
0.8 divided by 10 to the second power = 0.08
2 to the power of 20 divided by 4 to the power of 10 is equal to one.
381.8 divided by 10 to the fifth power equals 0.003818
7000000 - 5300000 = 1700000
486
0.8
2.3 times 10 to the 6th power = 2,300,000
10 to the negative 12 power