When teaching decimal numbers, first review the basics of thousands, hundreds, tens and ones and then introduce (or review) tenths, hundredths and thousandths.
Like any new skill, learning multiplication takes time and practice. It also requires memorization, which can be a real challenge for young students. The good news is that you can master multiplication with as little as 15 minutes of practice time four or five times a week. These tips and tricks will make the job even easier.