Question

Match the following multiplication results:

• A. $1,200$
• B. $90$
• C. $8$

Answer 1

$\bullet 0.8\times 10$

We know,
Multiplying by $10$: Decimal point moves $1$ unit to the right, i.e., $0.8\times 10=08.0=8$

$\therefore \underset{–}{0.8\times 10=8}$

$\bullet 9.0\times 10$

We know,
Multiplying by $10$: Decimal point moves $1$ unit to the right, i.e., $9.0\times 10=90.0=90$

$\therefore \underset{–}{9.0\times 10=90}$

$\bullet 12.00\times 100$

We know,
Multiplying by $100$: Decimal point moves $2$ units to the right, i.e., $12.00\times 100=1,200.0=1,200$

$\therefore \underset{–}{12.00\times 100=1,200}$