Question

Observe the patterns and fill in the blanks:

$73\times 9=73\times 10-1=729$

$73\times 99=73\times 100-1=7299$

$73\times 999=73\times 1000-1=72999$

$73\times 9999=73\times 10000-1=$______________________

$73\times 99999=73\times 100000-1=$____________________

• A. $729999$
• B. $7299999$

Answer 1

Given,

$73\times 9999=73\times 10000-1$

$$\begin{gathered} =73\times 10000-1 \\ =730000-1 \\ =729999 \end{gathered}$$

$$\begin{gathered} 73\times 99999=73\times 100000-1 \\ =7300000-1 \\ =7299999 \end{gathered}$$

Hence, required numbers are $729999$and$7299999$.