WASHINGTON — Facts went astray on tax cuts, negative campaign advertising and oil exports when Democrat Barack Obama and Republican John McCain engaged Wednesday in their third and final presidential debate.

Some examples:

OBAMA: "Every dollar that I've proposed, I've proposed an additional cut, so that it matches."

THE FACTS: The bipartisan Committee for a Responsible Federal Budget estimates that his programs would add $281 billion to the deficit at the end of his first term. The analysis includes Obama's proposals for saving money.

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McCAIN: "We have to stop sending $700 billion a year to countries that don't like us very much."

THE FACTS: This is a reference to U.S. spending on oil imports. McCain has repeatedly made this claim. But the figure is highly inflated and misleading. According to government agencies that track energy imports, the United States spent $246 billion in 2007 for all imported crude oil, a majority of it coming from friendly nations including neighboring Canada and Mexico. An additional $82 billion was spent on imported refined petroleum products such as gasoline, diesel and fuel oil. A majority of the refined products come from refineries in such friendly countries as the Netherlands, Canada, the United Kingdom, Trinidad-Tobago and the Virgin Islands.

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OBAMA: "One hundred percent, John, of your ads — 100 percent of them — have been negative."

THE FACTS: The statement is true when it comes to McCain's current commercial spots. But by saying McCain's ads "have been" 100 percent negative, Obama ventures into misleading territory. McCain is currently running all negative ads, according to a study by the University of Wisconsin-Madison. But he has run a number of positive ads during the campaign.

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McCAIN: "Sen. Obama is spending unprecedented amounts of money in negative attack ads on me."

THE FACTS: Obama is spending unprecedented amounts of money on ads, period — negative or otherwise. Obama is outspending McCain and the Republican Party by more than 2-to-1 in presidential ads. At one point in August, 90 percent of the ads Obama was airing were against McCain. A study conducted at the University of Wisconsin-Madison found that about 34 percent of Obama's ads are now negative.

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OBAMA: "I want to provide a tax cut for 95 percent of working Americans, 95 percent."

THE FACTS: Obama constantly says this. But the independent Tax Policy Center says his plan cuts taxes for 81.3 percent of all households in 2009.

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McCAIN: Said of Obama's running mate Sen. Joe Biden: "He had this cockamamie idea of dividing Iraq into three countries."

THE FACTS: Biden actually proposed dividing Iraq into three semiautonomous regions, not separate countries. He was a prime sponsor of a nonbinding Senate resolution that called for Iraq to have federal regions under the control of Kurds, Shiites and Sunnis in a power-sharing agreement similar to the one that ended the 1990s war in Bosnia.

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McCAIN: "Now, we have allocated $750 billion. Let's take 300 of that billion and go in and buy those home loan mortgages and negotiate with those people in their homes, 11 million homes or more, so that they can afford to pay the mortgage, stay in their home."

THE FACTS: Ordering the government to buy up bad mortgages to cut homeowners' monthly payments might sound good, but experts are skeptical. They say the plan McCain is promoting is unlikely to solve the housing crisis that's pushing the economy toward recession. One big problem: The vast majority of the toxic home loans that are clogging financial markets and freezing up credit have been repackaged into complex investments that the government would be hard-pressed to unravel and buy. And the government could end up paying far more than they would ever be worth. That could primarily help banks and lenders with taxpayer money.

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AP writers Tom Raum and Lita Baldor contributed to this report.