Calculating powers of 10 become easier when understanding that the exponent gives a clue to how many zeros there are after the 1.
For example, , that is, 10 to the first power has one zero after the 1.
, or
that is, 10 to the second power has two zeros after the 1.
Everybody is born to
biological parents. Our parents each had
biological parents. We can say that our grandparents are
mathematically as the number of our ancestors doubles with each generation we go back.
So:
We can identify the square numbers between two numbers by simply squaring basic numbers. For example:
To identify the square numbers between 20 and 40 we can say
is too small
is in the range
is in the range
is too large
So the square numbers in that range are 5 and 6.