3.3x 1/3，5.5x 1/ 10，0.5x 1/5，7.5× 1/3，6.5× 1/5 .？

9.6× 1/3, 10.8× 1/6,4.9× 1/7, 13.5 × 1/5,36× 1/6。

When calculating fractional multiplication with fractions or decimal multiplication with fractions, you can first convert the decimals into (fractions) and then calculate by multiplying (fractions), or use the denominator (divisor) of decimals and fractions before calculating.

Related information:

(1) Divide the fraction into decimals, and then calculate according to the multiplication rule of decimals, such as 0.21×1/2 = 0.21× 0.5 = 0.105.

(2) Extract the number of components, and then calculate according to the multiplication rule of fractions, such as: 0.32× 3/5 = 32/100× 3/5 = 8/25× 3/5 = 24/125.

(3) The denominator can be subtracted first (the denominator is 1), and then the decimal is multiplied by the integer, for example, 0.24× 2/3 = 0.08× 2/1= 0.16.

Reciprocal decimal method;

Decimal component number: There are several decimals, so writing a few zeros after 1 as the denominator and removing the decimal point of the original decimal as the numerator can reduce the number of quotation points.

Fractions into decimals: numerator divided by denominator, divisible numerator will be converted into finite decimals, divisible numerator will be converted into finite decimals, and generally three decimals will be retained.