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how many 8number beetwen 700and900

Sagot :

Let's go first to 700-799
Let's divide it into two parts, 700-750 and 751-
In the first part, we got 5 8's 
In the second part, we got 10 8's
So 5 + 10 = 15.
Meaning that in 700-800, there is 15 8's.

Second, let us go to 800-900
Let's divide it into two parts, 800-850 AND 851-900
In the first part, we got 56 8's
In the second part, we got 59 8's 
So 59 + 56 = 115's

By adding the parts, 115 + 15 = 130.
Meaning that there is 130 8 digit in 700-900.