Sagot :
Look at the hundred thousands column. Move one to the right. If that number is 5 or above then you round the hundred thousands column up, if it is below 5 you round down.
7,464,000---->7,500,000
21,079,000--->21,100,000
7,464,000---->7,500,000
21,079,000--->21,100,000