Marcus says: ‘When I divide a whole number by ${10}^4$, I just have to cross four zeros off the end of the number. When I divide a whole number by ${10}^5$, I just have to cross five zeros off the end of the number. This works for any positive whole number.’
Is Marcus correct? 

Work out the answer of the following:

$80000÷{10}^4$

Work out the answer of the following:

$510000÷{10}^3$

Work out the answer of the following:

$8460000000÷{10}^5$

Work out the answer of the following:

$230÷10$

Work out the answer of the following:

$230÷{10}^2$

Work out the answer of the following:

$230÷{10}^3$

Work out the answer of the following:

$230÷{10}^4$

Work out the answer of the following:

$65÷10$