Edit a mathematical expression with the Office tool

I am a math teacher, in the production of courseware and the preparation of electronic teaching plans often encountered mathematical expression input difficult problem, I found in peacetime, if there is no good mathematical formula editing software to use, the use of our most commonly used office can easily solve a variety of mathematical expression input problems. The following will I in the production of courseware and the preparation of electronic teaching plan summed up the input of the digital expression method introduced to everyone.

Upper and lower standard class expressions

For example, to enter an expression "X12+y12", you can easily implement it in Word by:

Figure 1

1, run Word, enter "X12+y12" first.

2. Select "1" in the text, click Font on the Format menu, and then in the Font dialog box that pops up, select the Font tab, then check the "subscript" in the "Options" field before checking the "2" in the "Options" field, and then check (Figure 1) before the "superscript" in the "option" fields [OK] Can.

The expression of fractional class

For example, to enter the fractional expression shown in Figure 2, you can implement it in PowerPoint by:

1, run PowerPoint, first select the horizontal Text tool in the Drawing toolbar, enter "Ax2+bx+c" and "dx2+ex+f" respectively.

Figure 2

2, respectively selected in the "2", click Font on the Format menu, and then check the superscript in the Options field in the Font dialog box that pops up, and after [OK], drag the left mouse button to align the two expressions up and down and keep a certain distance.

3. After selecting the line tool in the Drawing toolbar, draw a segment of the appropriate length in the two-type center that has been aligned.

4, select all the three objects, click the [Drawing] button and choose the "group" command to combine it into one whole.

The expression of square root type

In many software has the symbol to insert the function, but I found that the square root and we want is not particularly apt, instead of making a square root symbol of their own, to achieve the following methods:

1, run PowerPoint, select the Line tool in the Drawing toolbar, draw three lines of the appropriate length and adjust their position.

2, select all of these three objects, then click the [Drawing] button, choose the combination command to combine it into a whole is a root.

Figure 3

3. Enter the expression as Binker and drag it to the bottom of the square root that is already done (if necessary, adjust the square root according to the length of the expression to just cover the expression) and become a radical (Figure 3).

Vector-Class expressions

In the textbook, the vector marking method is "Start point-end" and put a small arrow above the position, and we in the production of this content courseware or the preparation of relevant electronic lesson plans, how to achieve it? The following example illustrates the implementation method shown in Figure 4.

1, run PowerPoint, input expression "op= (1-t) Oa+tob".

2. Select the line tool in the Drawing toolbar and draw two lines of the appropriate length and adjust the position. Then select the two objects, click the Draw button and choose the Group command to combine it into one whole to become the biased arrow shown in Figure 4.

Figure 4

3, copy this deviation of the arrows into three, placed in the OP, OA and OB on the top of the appropriate position and combined into one can be.

I hope that through my method, I believe you can design a mathematical expression that meets your actual needs.