High School

4. On subtracting 9999 from 19999, we get the result.

5. To reduce a number by 20000, we subtract the number from 20000.

Answer :

Let's solve each part of the student's questions step-by-step.

  1. Subtracting 9999 from 19999:

    To find the result of subtracting 9999 from 19999, you perform the simple subtraction:

    [tex]19999 - 9999 = 10000[/tex]

    So, the result is 10000.

  2. Reducing a number by 20000:

    If you want to reduce a number by 20000, you subtract 20000 from that number. For example, if your number is represented as [tex]x[/tex], then the operation would be:

    [tex]x - 20000[/tex]

    This subtraction will give you the new value after the reduction.

These examples illustrate basic arithmetic operations, which are foundational skills in mathematics, often covered in middle school.