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What are decimals real numbers natural numbers integers or whole numbers?
Decimals are real numbers. Furthermore, integers and whole numbers are the same thing.
How can you estimate sums or differences of decimals?
In the same way as you estimate them for whole numbers.
What is the same between decimal and fraction?
Decimals are numbers that can be expressed like this. 10.56 or 16.4 or 46.324672462 These numbers show that the numbers are between whole numbers. Fractions do the same thing. Fractions tell you the number between the two whole numbers, just more accurately. For example.. 3/4 is a number between 0 and 1. The fraction 23/7 is a number between 3 and 4 and if you do this on a calculator and turn it into decimal form you will get a large amount of decimals. this proves that the fraction form is more accurate.
How do you add decimals with different signs?
Same rules as adding whole numbers with different signs.
How do you get the average for three numbers tha contain decimals?
Exactly the same way you do when they're all whole numbers, or there are more than three numbers, or they're a mixture of whole numbers and decimals: -- Add up all the numbers on the list. -- Divide the big sum by the number of items on the list.
