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Who is Michael stiple?
The guy who invented the addition sign
How was addition invented?
Oh honey, addition wasn't "invented" like some fancy new gadget. It's just a basic math operation that humans figured out to combine numbers and make life easier. Someone probably realized they had two apples and two more apples, put them together, and thought, "Hey, that's four apples!" And just like that, addition was born.
What are the parts of an addition problem?
There are many parts that go into an addition problem. Most often there are numbers, a plus sign, and an equals sign.
What is the opposite of less than sign?
The less than sign I believe that you are talking about is the minus/subtraction sign? The addition sign, +, is the opposite of the subtraction sign :)
Why when subtracting a negative number must you change the subtraction sign to an addition sign?
Because a negative negative is the same a a positive, and because of the definition of subtraction and addition.
