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Earn +20 ptsQ: How do you add and subtract real numbers efficiently?
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How do you know whether you should add or subtract the value of the two numbers?
By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract
When can you add or subtract mixed numbers?
You can always do that.
How do you add numbers with different signs?
You add all the numbers with + signs and subtract all that have minus signs.
How do you add and subtract mixed numbers with unlike denominators?
just change the fration with the smallest denominator and add or subtract the way you always do.
When adding numbers with exponents do you add or subtract the exponents?
you do not do anything when you add numbers with exponents. you just figure out the answer. it is only if you multiply numbers with exponents, where you add the exponents..
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