Question

Required product = 999 x 99
= 999 x (100 - 1)
= 999 x 100 - 999 x 1 [Using distributivity]
= (1000 - 1) 100 - (1000 - 1) x 1
= 1000 x 100 - 1 x 100 - 1000 + 1
= 100000 - 100 - 1000 + 1
= 100001 - 1100​

Answer 1

Answer:

correct

Step-by-step explanation:

instead of doing such a long step u can directly multiply like

$(1000 - 1) \times (100 - 1)$

Answer 2

Answer:

99901

Step-by-step explanation:

your steps are correct and answer is 99901