When you go shopping for something you might have to round decimals to find what you have to pay.
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It belongs to the set ofrational numbers,decimal fractions,improper fractions (in decimal form),real numbers,complex numbers,quaternions.
One situation is when shopping for grocery items ... things will be priced using the decimal system: Tomato's, $1.59 per pound. Knowing that 1.59 is less than 1.75 could be beneficial.
Irrational: it cannot be written exactly in the decimal notation.
Signed numbers are used for:TemperatureMoney, Accounting, or EconomyMath Problems
Natural numbers are all the counting numbers excluding zero and all negative numbers. People use these in everyday life to count, add, subtract, and even with money purposes