Answer:Step-by-step explanation:345,965:Hundred thousand: Look at the ten thousands digit (4). Since it’s less than 5, round down.Rounded number: 300,000Ten thousands: Look at the thousands digit (5). Since it’s 5 or more, round up.Rounded number: 350,000Thousands: Look at the hundreds digit (9). Since it’s 5 or more, round up.Rounded number: 346,000975,887:Hundred thousand: Look at the ten thousands digit (7). Since it’s 5 or more, round up.Rounded number: 1,000,000Ten thousands: Look at the thousands digit (5). Since it’s 5 or more, round up.Rounded number: 980,000Thousands: Look at the hundreds digit (8). Since it’s 5 or more, round up.Rounded number: 976,000254,153:Hundred thousand: Look at the ten thousands digit (5). Since it’s 5 or more, round up.Rounded number: 300,000Ten thousands: Look at the thousands digit (4). Since it’s less than 5, round down.Rounded number: 250,000Thousands: Look at the hundreds digit (1). Since it’s less than 5, round down.Rounded number: 254,000810,925:Hundred thousand: Look at the ten thousands digit (1). Since it’s less than 5, round down.Rounded number: 800,000Ten thousands: Look at the thousands digit (0). Since it’s less than 5, round down.Rounded number: 810,000Thousands: Look at the hundreds digit (9). Since it’s 5 or more, round up.Rounded number: 811,000