Multiplication or division of a monomial by a number — lesson. Mathematics CBSE, Class 7.

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When multiplying or dividing a monomial by a number, the coefficient of a given monomial is multiplied or divided, but the variable factors remain the same.

Example:

1) Multiply the monomial

$2a$ by

$8$

$2 a \cdot 8 = 2 \cdot 8 a = 16 a$

(

$2$ oranges times

$8$ is

$16$ oranges)

2) Divide the monomial

$14b$ by

$7$

$14 b : 7 = (14 : 7) b = 2 b$

(if

$14$ bananas are divided equally between

$7$ people, each person will have

$2$ bananas)

3) Divide the monomial c by

$10$

$c : 10 = (1 : 10) c = \frac{1}{10} c = 0,1 c$

(

$1$ lemon divided by

$10$ is

$1$ tenth of a lemon)

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4. Multiplication or division of a monomial by a number

Theory: