This semester, I learned to multiply fractions!

I have only studied integer multiplication before, but I have never heard of fractional multiplication. Under the guidance of the teacher, I know why it is called fractional multiplication!

Although it is a decimal, it can be counted as an integer.

Second, calculate the product with an integer first, and then add the decimal point to the product point after the calculation. Look at a factor * * *, how many decimal places are there, and count the decimal points from the right side of the product! The decimal place of the product is not enough, so you should add 0 in front and then the decimal point.

Third, the position of the exchange factor, multiply to see if it is right, or use a calculator to look it up.

Four, according to the need, according to the "rounding" method to retain a certain number of decimal places.