The classes will be starting the year with a review of decimal operations. Addition, subtraction, multiplication, and division using numbers with decimals should be a review for previously learned skills. With addition and subtraction, students must remember to let the decimal rule when lining up the problem. This may mean adding zeroes to provide a digit to add or subtract, but the decimal rules the line up.
With multiplication, the decimal does not have to line up to work the problem. The number of decimal places to the right of the decimal in both parts of the multiplication problem tells where to place the decimal in the product.
In division, the decimal in the divisor is moved to the right until there are no digits to the right (so it is a whole number). BUT however many places you move the decimal to the right in the divisor, you must also move the decimal in the dividend (and therefore the quotient as well).
With multiplication, the decimal does not have to line up to work the problem. The number of decimal places to the right of the decimal in both parts of the multiplication problem tells where to place the decimal in the product.
In division, the decimal in the divisor is moved to the right until there are no digits to the right (so it is a whole number). BUT however many places you move the decimal to the right in the divisor, you must also move the decimal in the dividend (and therefore the quotient as well).