Question

determine the product of greatest 4 digit number and the greatest 3 digit number by using properties

Answer 1

Step-by-step explanation:

9999*999

=(10000-1)(1000-1)

=10000*1000+10000*-1-1*1000-1*-1

=10000000-10000-1000+1

=10000000-10999

=9989000

Answer 2

Answer:Largest 4 digit number=9999

Largest 3 digit number=999

So we have,

9999*999

(10000–1)*999

Using distributive property it can be written as

10000*999–1*999

=9990000–999

=9989001