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Multiplication of Integers:
(i)    Rule for multiplication between integers of opposite sign - When integers with opposite signs are multiplied, the result will be the product of the integers with negative sign on the product. In general for any two positive integers a and b we can say, a             a x (- b) = (- a) x b = - (a x b)
Ex.    – 4 x 5 = –(4 x 5) = –20
4 x –5 = –(4 x 5) = –20

(ii)    Rule for multiplication between integers of same sign - When integers with same sign are multiplied, the result will be the product of integers with positive sign on the product. In general, for any two positive integers a and b,  (- a) x (- b) = a x b
Ex.    –5 × –4 = 20
5 × 4 = 20
(a)    The product of two negative integers is a Positive integer.
Ex.    (-4) x (-7) = 28

(b)    The product of three negative integers is a Negative integer.
Ex.    (-4) x (-7) x (-1) = -28

(c)    The product of four negative integers is a Positive integer.
Ex.    (-4) x (-7) x (-1) x (-2) = 56

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Course : CBSE Class 7

Start Date : 21.01.2022

End Date : 03.03.2022

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 Subject M T W T F S S Mathematics(120 hours) 7:00 PM 7:00 PM 7:00 PM 7:00 PM 7:00 PM - - 