1) The document discusses rounding numbers to the nearest place value (tens, hundreds, thousands, ten thousands, hundred thousands). It provides examples of underlining the relevant digit and determining if it rounds up or down based on being above or below 5.
2) Steps are described for writing numbers in word form or numeric form by building a place value chart and filling in the correct digit based on the place value.
3) Determining the place value and digit value of underlined numbers in larger numbers is also covered through using place value acronyms.