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Using fractions in real life?
You use fractions (or some variation, such as decimals) in any situation where whole numbers are not sufficient. For example, when you want to measure the object of a length in meters, and a whole number of meters is not precise enough.
Fractions and decimals?
Fractions and decimals are different ways of notating the same thing: a number that falls between two whole numbers. In its simplest form, think about a distance or a value that is exactly halfway between 3 and 4 of something. As a mixed number, that would be 3 and 1/2 As a fraction, that would be 7/2 As a decimal, that would be 3.5 Some people refer to mixed fractions or decimal fractions to underscore the fact that they're all the same.
Why are mass numbers whole numbers?
mass numbers are whole numbers because the mass number is number of protons in an atom, plus the number of neutrons. you can only have a whole neutron and or proton, therefore, all mass numbers are whole numbers.
Are integers rational numbers?
Integers are whole numbers. Rational numbers can be fractions / decimals. But it is NEVER a whole number E.G. of rational numbers : 3/4 or 1.5
What is the difference between whole numbers and positive integers?
Whole numbers are generally speaking numbers that are "whole" or without fractions and decimals. Generally they are considered to be the natural numbers (or counting numbers) plus zero. The set of whole numbers is {0, 1, 2, 3, ...}. Positive integers are numbers in the set of integers that are greater than zero. The integers {..., -2, -1, 0, 1, 2, ...}. The positive integers {1, 2, 3, ...}. So generally the only difference is whether or not zero is included. Note that there are arguably different sets that can be called whole numbers (such as without the zero, or even somewhat rarely all integers positive and negative).
