Question

To multiply :78956 by 999 a student
multiplied it by 1000 and got
78956000. What should be added to
78956000 to get right answer?
a)-999
c) -78956
d) o
b) 78956​

Answer 1

Answer:

-78956

because when you multiply by 1000 the anwer you get is 78956 more than the required multiplication by 999 so we reduce it by that amount to find the answer required.

Answer 2

Answer:

c) - 78956

Step-by-step explanation:

why?

78956 * 1 = 78956 ---- statement 1

78956 * 1000 = 78956000 ---- statement 2

subtracting statement 1 from statement 2

78956 * 1000 - 78956 * 1 = 78956000 - 78956

78956 * ( 1000 - 1 ) = 78956000 - 78956 ( Taking 78956 common )

78956 * 999 = 78956000 - 78956