Math Fun Drill (Addition & Subtraction with 100-Bead Abacus)

This booklet was written by Mr. Takao Moriyama of Tsukuba University Elementary School, with the aim of helping first-grade elementary school students easily understand the structure of numbers using a 100-bead abacus. Rather than rote learning, this workbook is designed so that students will naturally acquire the decimal place-value system by using it in a step-by-step manner. It is a book that will help students approach numbers with confidence. Its effectiveness will be doubled when used together with the red and yellow Tomoe 100-bead abacus.