Learn Class 8 Math - Playing with Numbers

What is the General Form of Numbers?

For PQ, if the general form is needed, it will look like this:

pq=10p+q

Games with Numbers

Reversing the Digits – Two-Digit Number

Step 1: Let us select any two-digit number ab, which may be written as (10a + b).

Step 2: Its opposite two-digit number can be ba, which may be written as (10b + a).

Step 3: The sum of each of the numbers is ab + ba,

Step 4: By dividing the number by 11, we get eleven (a + b)/11 = (a + b).

Reversing the Digits – Three Digit Number

Step 1: Let's pick any 3 digit quantity ABC, which may be written as (100a + 10b + c).

Step 2: Its opposite quantity can be CBA, which may be written as (100c + 10b + a).

Step 3: By subtracting each of the numbers, i.e. ABC - CBA

Step 4: By dividing the quantity via 99 we get 99 (a-c)/9 = (a-c).

Forming Three-digit Numbers with three digits.

Step 1: Let us take any 3 digit quantity ABC, which may be written as (100a +10b + c).

Step 2: Rearrange the quantity in this type of manner that is bureaucracy specific numbers.

Step 3:By including all of the 3 numbers

Step 4:By dividing the quantity by 37, we usually get the rest zero.

Learning Videos for 8th Grade Math - Playing with Numbers