The rules of arithmetic are simple, and all these tools follow them faithfully.
算术规则非常简单，所有这些工具都忠实地遵守它们。
Based on actual learning, this research had studied primary students' learning about rules of arithmetic operation by worked-example learning.
本研究立足于学习实际，对小学生通过样例学习运算规则进行了实验研究。
Based on actual learning, this research had studied primary students' learning about rules of arithmetic operation by worked-example learning.
本研究立足于学习实际，对小学生通过样例学习运算规则进行了实验研究。
应用推荐