How many times smaller is the value of the 6 in 621 than the value of the 6 in 6420

The 6 in 621 is in the hundred's place, so alone it would equal 600.

However, the 6 in 6,420 is in the thousand's place, so it alone would equal 6,000. 
 
The question is asking how many times smaller is the value of 6 in these two numbers. Therefore, you need to divide 6,000 by 600.

Your answer should be 10.

a - base

b - exponent

so,

the base is 8the exponent is 3the exponent tells you to multiply 8 together three timesthe expanded form is 8*8*8

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