Standard Form by Boxed Rockets

Convert these numbers between standard form and normal numbers

2.66 \times 10^{3}

2660

7.5 \times 10^{6}

7500000

4.71 \times 10^{- 3}

0.00471

76300

7.63 \times 10^{4}

2640000

2.64 \times 10^{6}

0.000129

1.29 \times 10^{- 4}