Let's simplify: $28\times 1000-0.01\times {1000}^2$

ⓘ Multiplications are done before additions and subtractions: $28\times 1000$ = $(20+8)\times 1000$ = $20\times 1000+8\times 1000$ = $\mathrm{20,000}+8000$ = $\mathrm{28,000}$■Powers are computed before multiplications, additions and subtractions. An integer power is a repeated product: ${1000}^2$ = $1000\times 1000$ = $\mathrm{1,000,000}$

$\mathrm{28,000}-0.01\times \mathrm{1,000,000}$

ⓘ Multiplications are done before additions and subtractions. Multiply without the decimal points, then put the point back by counting the decimals of both factors: $0.01\times \mathrm{1,000,000}$ = $\frac{\mathrm{1,000,000}}{100}$ = $\mathrm{10,000}$

$\mathrm{28,000}-\mathrm{10,000}$

ⓘ Start from $\mathrm{28,000}$ and move back $\mathrm{10,000}$ on the number line: $\mathrm{28,000}-\mathrm{10,000}$ = $\mathrm{18,000}$

▶Simplified form:   $\mathrm{18,000}$