When students multiply two decimals, they first multiply as if there is no decimal. Then they count the number of decimal digits in each number and put the same number of digits after the decimal point in the product. Students practice this concept in great detail with this multiply tenths and hundredths: 1-digit multiplication worksheet. This worksheet is about practicing with the horizontal format in which numbers are written side by side. To develop flexibility with numbers and operations, students need to have enough practice in this format and not just rely on the vertical/column method.