Question

I need to know the unit and standard form of:(2 tens 1 one) × 10(5 hundreds 5 tens) × 10(2 thousands 7 tens) ÷ 10(4 ten thousands 8 hundreds) ÷ 10

Answer 1

We are to write the unit form and standard form of the given statements.

(i) (2 tens 1 one) x 10

`\begin{gathered} (\text{ (2}*10)\text{ }+\text{ 1 ) }*10 \\ (20\text{ }+1)\text{ }*10 \\ 21\text{ }*10 \\ 210 \\ 2.10\text{ }*10^2 \end{gathered}`

(ii) (5 hundreds 5 tens) × 10

`\begin{gathered} (\text{ (5}*100)\text{ + (5}*10)\text{ ) }*10 \\ (500\text{ + 50) }*10 \\ 550\text{ x 10} \\ 5500 \\ 5.500\text{ }*10^3 \end{gathered}`

(iii) (2 thousands 7 tens) ÷ 10

`\begin{gathered} (\text{ (2}*1000)\text{ + (7}*10)\text{ ) divided by 10} \\ (2000\text{ }+\text{ 70) divided by 10} \\ 2070\text{ divided by 10} \\ 207 \\ 2.07\text{ }*10^2 \end{gathered}`

((iv) 4 ten thousands 8 hundreds) ÷ 10​

`\begin{gathered} (\text{ (}4*10,000)\text{ + }(8*100)\text{ ) divided by 10} \\ (40,000+800)\text{ divided by 10} \\ 40,800\text{ divided by 10} \\ 4080 \\ 4.080\text{ }*10^3 \end{gathered}`