345,961 rounded to:Nearest hundred thousand:Check digit in ten thousand place: 4Since 4 is less than 5, round downAnswer: 300,000Nearest ten thousand:Check digit in thousand place: 5Since 5 is equal or more than 5, round upAnswer: 350,000Nearest thousand:Check digit in hundreds place: 9Since 9 is more than 5, round upAnswer: 346,000