Question

how many 8-digit numbers are there in all?

Answer 1

Answer:

100 000 000

Step-by-step explanation:

Answer 2

Answer:

10000000 to 99999999

so totally 900000000

Step-by-step explanation:

2-digits

10 to-99 =90

3-digits

100 to-999 =900

4-digits

1000 to-9999 = 9000

so

8-digits

10000000 to-99999999 =90000000