Multi-digit subtraction is difficult for students to learn. The purpose of this study is to explore how second-grade students communicate their understanding of double-digit subtraction through the use of manipulatives/tools. This qualitative study reports on six case studies of second-grade students...
当当中华商务进口图书旗舰店在线销售正版《海外直订Subtraction Workbook: One Page A Day Math Single and Double Digit Subt 减法练习册:每日一页数学单位数和两位数减法问题练习》。最新《海外直订Subtraction Workbook: One Page A Day Math Single and Double Digit Su