If the numbers are too high or too difficult to subtract in your head, write them down in columns. Separate the numbers into ones, tens, hundreds and thousands. List the numbers in a column and ...

m\) and one of length \({1.02}~m\). What is the total length of wood that David needs to cut? You can add zeros to the end of a decimal without affecting its value, so 0.6 is the same as 0.60.