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

Factorise a² – 2ab + b² – c².

Factorise m⁴ – 256

Express the following number in standard form.

4050000

Express the following number in standard form.

0.000035

Express the following number in the usual form.

Express the following number in the usual form.

Express the following numbers in the usual form.

Find: `2/5 xx (-3)/7 - 1/14 - 3/7 xx 3/5`.

Which of the following is an example of distributive property of multiplication over addition for rational numbers?

For rational numbers `a/b, c/d` and `e/f` we have `a/b xx (c/d + e/f)` = ______ + ______.

`1/5 xx [2/7 + 3/8] = [1/5 xx 2/7] +` ______.

For every rational numbers x, y and z, x + (y × z) = (x + y) × (x + z).

For all rational numbers a, b and c, a(b + c) = ab + bc.

Verify the property x + y = y + x of rational numbers by taking

`x = 1/2, y = 1/2`

Verify the property x + y = y + x of rational numbers by taking

`x = (-2)/3, y = (-5)/6`

Verify the property x + y = y + x of rational numbers by taking

`x = (-3)/7, y = 20/21`

Verify the property x + y = y + x of rational numbers by taking

`x = (-2)/5, y = (-9)/10`

Simplify the following by using suitable property. Also name the property.

`[1/2 xx 1/4] + [1/2 xx 6]`

Simplify the following by using suitable property. Also name the property.

`[1/5 xx 2/15] - [1/5 xx 2/5]`

Simplify the following by using suitable property. Also name the property.

`(-3)/5 xx {3/7 + ((-5)/6)}`