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No. An addition operation need not even be defined.

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16y ago

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Past tense of close?

The past tense of "close" is "closed."


Is closed an action verb?

Close can be an action verb: to close the door, or close the sale, or close your eyes.


What is closing a rational number under addition And can you close them under subtraction multiplication and division?

Rational numbers are numbers that can be expressed as a fraction a/b where a and b are both integers and b is not equal to zero. All integers n are rational numbers because they can be expressed as the fraction n/1. Rational numbers are closed under addition, subtraction, multiplication and division by a non-zero rational. To be closed under addition, subtraction, multiplication and division by a non-zero rational means that if you have two rational numbers, when you add, subtract, multiple or divide them, you will get another rational number. For example, take the rationals 1/3 and 4/3. When you add them together, you get another rational number, 5/3. Same with the other operations. 1/3 - 4/3 = -1 (remember integers are rational, too) (1/3) * (4/3) = 4/9 (1/3) / (4/3) = 1/4


Is the word closed a verb?

It can be. close / closed I close the door every night. She closed the door with a bang. It can also be an adjective. He had a closed circle of friends.


What is the present perfect tense of close?

I/We/You/They have closedHe/She/It has closed


What is the past participle of close?

"Close" is a regular verb; therefore, its past participle is "closed".


What is the past tense of closes?

The past tense of close is closed.


What is a closed switch?

A normally closed switch is a switch that is normally closed. When you operate it, it opens.


Why did manzanar close?

It closed in 1940


What is past tense of close?

closed.


What is the proper closed office door etiquette that should be followed in a professional setting?

In a professional setting, it is important to knock before entering a closed office door to respect the privacy of the person inside. Wait for a response before entering, and always close the door gently behind you when leaving.


When did frontierland close?

the main park closed in 1999 the polo tower closed in 2000