학생 지침
Click on the
The first few pages of this activity show you how to use the mental math strategy for adding left to right. Using the
tool, answer the next few pages making sure to show your work. You may also use the
to explain your answers. Click on the green
to send to your teacher when you are done.
선생님 메모 (학생들에게는 보이지 않음)
Mental Math: adding left to right