There's no single "correct" way to say the number 1,302,710,452, as it depends on context and personal preference. However, here are several options, ranging from the most formal to the most casual:
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One billion, three hundred two million, seven hundred ten thousand, four hundred fifty-two: This is the most formal and precise way to say the number. It's ideal for situations requiring absolute clarity, such as financial reports or scientific papers.
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One point three billion: This is a more concise and commonly used approximation, suitable for informal conversations or situations where a precise figure isn't crucial. It's useful when the emphasis is on the magnitude of the number rather than its exact value.
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Thirteen hundred and two million, seven hundred and ten thousand, four hundred and fifty-two: This is a variation on the formal method, using "and" between the hundreds and thousands. This is common in some English dialects.
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One billion three hundred and two million, seven hundred and ten thousand four hundred and fifty two: Similar to above but with slight variations of phrasing.
The best way to say the number will depend on the specific situation and your audience. If precision is paramount, use the full formal version. If brevity is preferred, the approximation is suitable.
