Dạy học cộng trừ có nhớ trong phạm vi 100

Abstract

“Addition, subtraction with a memory up to 100” is a fundamental topic in the textbook of Mathematics 2. The related formulas and techniques are intitially important steps to do all types of adding and subtracting multi-figure numbers. Each lesson content format and that of the topic itself have their own features. It is necessary to take into sufficient considerarion the exploring of these content features so as to actively teach addition, subtraction with a memory up to 100 in Mathematics 2.