You can
put this solution on YOUR website!
8.31×107 =
8.31×10×10×10×10×10×10×10 =
83.1×10×10×10×10×10×10 =
831.×10×10×10×10×10 =
8310.×10×10×10×10 =
83100.×10×10×10 =
831000.×10×10 =
8310000.×10 =
83100000. =
83100000
Can you figure out a shortcut? There is a way that takes just
one step instead of nine. Examine what happens up there every
time we multiplied by 10. What happened to the decimal? How many
places did it move? If you can't figure out the shortcut right
away, then do it the above way. Sooner or later you will figure
out the decimal-moving way to do it all in one step.
Edwin