ADDITION, SUBTRACTION, AND FRACTIONAL DIVISION

摘要

PROBLEM TO BE SOLVED: To perform calculation by understanding meaning of addition, subtraction and fractional division.;SOLUTION: A concrete object (tile) is made to perform teardown of numbers (division of the numbers of 5 and the numbers of 10), and then, the numbers are used to practice the teardown. The method of fractional calculation is contrived by self to be calculated.;COPYRIGHT: (C)2007,JPO&INPIT