Question

Observe the patterns and fill in the blanks:

$116+9=116+10-1=115+10$$63\times 5=63\times \frac{10}{2}=630\times \frac{1}{2}$

$63\times 15=63\times \frac{30}{2}=630\times \frac{3}{2}$

$63\times 25=63\times \frac{50}{2}=630\times \frac{5}{2}$

$63\times 35=63\times \frac{70}{2}=630\times$_______________

$63\times 45=63\times \frac{90}{2}=630\times$_______________

$116+99=116+100-1=115+100$

• A. $\frac{7}{2}$
• B. $\frac{9}{2}$

Answer 1

Given, $63\times \frac{70}{2}$

$=63\times 10\times \frac{7}{2}$

$630\times \frac{7}{2}$

and,

$63\times \frac{90}{2}$

$=63\times 10\times \frac{9}{2}$

$630\times \frac{9}{2}$

Hence required number is $\frac{7}{2}$and$\frac{9}{2}$.