Current location - Training Enrollment Network - Mathematics courses - What does this symbol mean, like a section m, what does it mean to add things up and down? Senior one practices.
What does this symbol mean, like a section m, what does it mean to add things up and down? Senior one practices.
Reading well (fast reading)

It means peace.

For example, on a picture.

Finger obedience

Start summing up until six sigma.

be qualified for sth

That is to find the sum of L 1+ ... +L2.