The calculation method is: one point and fifty cents, two points and one yuan. One hundred percent is 50 taels, which is 50 yuan.

? The new curriculum standard of primary school mathematics stipulates that students should have the ability to calculate integers, decimals and fractions. In the teaching requirements, it is also emphasized that "students can correctly calculate integers, decimals and fractions, and achieve a certain degree of proficiency in some basic calculations, and gradually make the calculation method reasonable and flexible." In terms of quantity, calculation occupies a large proportion in primary school mathematics textbooks. Pure calculation teaching runs through the whole primary school mathematics textbook, from integer addition and subtraction, multiplication formula and formula quotient within 20 in the lower grades, to two-digit integer multiplication and division in the middle grades, and then to the four operations of decimal, fraction addition, subtraction, multiplication and division in the upper grades. External space and graphics, statistics and probability, synthesis and practice are all inseparable from calculation. From a qualitative point of view, calculation also plays an important role in cultivating students' meticulous thinking, rigorous attitude and quick response. To sum up, calculation teaching plays an important role in primary school mathematics teaching.