Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions for Mathematics

For all rational numbers x and y, x – y = y – x.

For all rational numbers x and y, x × y = y × x.

Subtraction of rational number is commutative.

Rational numbers can be added (or multiplied) in any order

`(-4)/5 xx (-6)/5 = (-6)/5 xx (-4)/5` 

Using suitable rearrangement and find the sum:

`4/7 + ((-4)/9) + 3/7 + ((-13)/9)`

Using suitable rearrangement and find the sum:

`-5 + 7/10 + 3/7 + (-3) + 5/14 + (-4)/5`

Verify the property x × y = y × x of rational numbers by using

`x = 7` and `y = 1/2`

Verify the property x × y = y × x of rational numbers by using

`x = 2/3` and `y = 9/4`

Verify the property x × y = y × x of rational numbers by using

`x = (-5)/7` and `y = 14/15`

Verify the property x × y = y × x of rational numbers by using

`x = (-3)/8` and `y = (-4)/9`

Name the property used in the following.

`-7/11 xx (-3)/5 = (-3)/5 xx (-7)/11`

The next two numbers in the number pattern 1, 4, 9, 16, 25 ... are ______.

`root(3)(1000)` is equal to ______.

If m is the cube root of n, then n is ______.

The sum of first six odd natural numbers is ______.

The cube root of a number x is denoted by ______.

The cube root of 8000 is 200.

The sum of first n odd natural numbers is n².

If a² ends in 5, then a³ ends in 25.

If a² ends in 9, then a³ ends in 7.