The two numbers that have a tens digit that is eight more than the ones digit are 80 and 91. Note that there are some larger numbers that also exhibit this pattern, such as 180, 280, 191 or 291.
Continue ReadingThe ones digit and tens digit are both examples of place values. Each column in a number to the left or right of the decimal has a place value. If there is a one in the tens column, it represents one set of 10. Likewise, if there is a two in the hundreds column, it represents 2 sets of 100, or 200 total.
Learn more about NumbersA place value is the value of the place of the digit in a number. The value of each place is 10 times the place to its right. For instance, a digit in the tens column has a value ten times the value of the ones place.
Full Answer >The answer to the riddle "From what number can you take half and leave nothing?" is the number 8, because when either the top or bottom half of the digit is removed, the remaining half forms the number zero, or nothing.
Full Answer >From right to left, take each digit in the base 16 number and multiply it by 16^n, where "n" is the number of places to the left of the rightmost digit, then sum the results together to get the base 10, or decimal, value. For the rightmost digit, n is 0.
Full Answer >When rounding a whole number, it is important to identify first the digit being rounded with its place value, such as tens, or hundreds. Once the rounding digit is identified the rule is to look at the number that is to the right of the rounding digitto see if it is less than or greater than 5. If this number is 5 or greater, the rounding digit increases by 1and the digits to the right of it become zeros.
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