5000000000-1000000000等于多少?

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5000000000-1000000000等于多少?
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5000000000-1000000000等于多少?
5000000000-1000000000等于多少?

5000000000-1000000000等于多少?
5000000000-1000000000
= 5×1000000000-1000000000
= (5-1)×1000000000
= 4×1000000000
= 4000000000

4000000000