you just look if the number in the side is larger than 5-9 go up on number and make on right zero if no larger than 5-9 keep same number and make every thing zero on right 4.89 = 5.00 9876.2543 = 9876.0000 nine thousand eight hundred seventy-six and two thousand five hundred forty-three millionths is you know the rest
The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.
Because rational numbers aren't able to be notated precisely in decimal form. They don't stop.
The simplest is to convert both into the same form. Whether you choose to go for two decimal numbers or two fractions is a matter of personal preference. Add the two parts together and you have your estimate.
In more than 40 years as a mathematician, I have never needed to do so.
Whole numbers are a proper subset of decimal numbers. All whole numbers are decimal numbers but not all decimal numbers are whole numbers.
The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.
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Because rational numbers aren't able to be notated precisely in decimal form. They don't stop.
The simplest is to convert both into the same form. Whether you choose to go for two decimal numbers or two fractions is a matter of personal preference. Add the two parts together and you have your estimate.
In more than 40 years as a mathematician, I have never needed to do so.
Whole numbers are a proper subset of decimal numbers. All whole numbers are decimal numbers but not all decimal numbers are whole numbers.
The number is already in decimal form so why would you want to estimate it in decimal form???
Any amount of numbers can be in a decimal.
All real numbers can be represented in the decimal system. Complex numbers can be represented by a pair of numbers in the decimal system.
Decimal numbers that can be expressed as fractions are rational but decimal numbers that can't be expressed as factions are irrational
They are the decimal numbers that can't be expressed as fractions.
Almost all numbers that we use in daily life are decimal numbers. The place value of each digit is ten times the place value of the digit to its right. And that is all that is required of decimal numbers. A decimal point is not necessary.