Writing formulas in Word requires the "Formula Editor" tool that comes with Word, so you should first see if this tool is installed in your Word. The method is: in the Word document, click the Open Insert menu and select the Object command, and the Object dialog box will pop up. Check whether there is an option of Microsoft formula in the object type list box of the New tab. If not, you need to install it.
Install formula editor
The specific steps of installing the formula editor are as follows: insert the installation disk of Office into the CD-ROM drive, and double-click the installation icon in the installation disk in the browser to open the Microsoft Office XP installation dialog box. Since the Word program has been installed, the maintenance mode option pops up (the default choice is "Add or Remove Function"), and click the Next button. Enter the step of "Select all Office applications and tools to be installed at the top", click the plus sign in front of "Office tools" in the list box of "Functions to be installed" to expand daily records, then right-click the icon of Formula Editor in the subdirectory, and click the "Run from this computer" command in the pop-up shortcut menu. Then click the "Update" button to start the automatic installation of the formula editor.
Open the formula editor
Open the object dialog box, and you can find the option of "Microsoft Formula" in the object type, indicating that this function has been installed correctly.
Select the Microsoft Formula 3.0 option, and then click OK to open the formula toolbar. There are 19 buttons on the formula toolbar, including 8 types of symbols, large and small Greek letters and 9 types of templates. Such as: fractional symbol, integer symbol, summation symbol, etc. In addition, there is a formula box on the toolbar, so that we can write the formula we want in Word.
Insert chemical formula
The chemical formula looks very complicated, but it is very easy to input with the formula editor. For example, the reaction formula between ferric ion and phenol consists of letters, numbers, superscript, subscript, arrows and brackets. Among them, letters, numbers and symbols can be input from the keyboard, and others will be edited by the formula editor.
First, we position the cursor where we want to insert the formula, then open the formula toolbar, enter the "Fe" of iron ion in the formula box, and then add a trivalent superscript on it. To insert superscript, you need to use the subscript and superscript templates in the formula toolbar. Click the Subscript and Superscript Template button to open the template. As can be seen from the template, each symbol consists of a gray box (or virtual box) and a small black box. The small black box represents the superscript or subscript to be input at present, and the gray box (or virtual box) represents the text before the superscript or subscript. The difference between the two is that for the symbols composed of gray squares and small black squares, we only need to fill in the upper (lower) mark; For the symbol composed of a virtual box and a small black square, we need to fill in the upper (lower) mark and the previous text.
Tip: When the cursor points to different symbols, the functions of the corresponding symbols will be displayed on the status bar.
Click the first symbol in the subscript and superscript templates, and a virtual box will appear in the upper right corner of "Fe". Enter "3+" in the virtual box, and then click the direction key "→" on the keyboard to restore the cursor to the normal position. Continue to input, and input the subscript of phenol according to the above method. Next, you need to insert a reaction arrow into the reaction formula, and you need to select the right arrow in the "arrow symbol" to represent it. The Arrow Symbol template includes different arrow symbols. You can choose the left and right arrows as reaction symbols, the up and down arrows indicate the gas or precipitate produced by chemical reaction, and the derivative symbols indicate causality. Use "fence template" for square brackets and parentheses in the reaction. Click the Fence Template button, click the second symbol in the open template, and then insert square brackets. You can enter text in square brackets and then insert brackets in the same way. Finally, enter the remaining contents into the formula box, click the left mouse button outside the formula box to complete the formula writing and close the formula toolbar. If you find an error in the entered formula, double-click the formula and open the formula toolbar to modify it.
Insert mathematical formula
(1) algebraic formula
The following is the root formula of quadratic inequality in one variable. How is Word written? The square of b can be completed by the superscript we introduced above. What about square root, formula and less than or equal to sign? This requires the use of relational symbols, fractional and radical templates, and operational symbols on the formula toolbar.
We position the cursor at the position where the formula needs to be inserted in the Word document and open the formula toolbar. The first input of the root formula of unary quadratic inequality is fraction. We open the fraction and the root template, and select the symbol of "vertical fraction of standard size" provided in the template. In addition, there is a symbol of "square root" in the score and root template, which we will use soon. After inserting the symbol "vertical fraction of standard size", a fraction appears in the formula box, and there are two virtual boxes above and below it, which are used to input the numerator and denominator respectively. You can use the up and down arrows on the keyboard to switch back and forth between denominator and numerator. We have seen the symbol of "square root" in molecules in "Fraction and Radical Template". After inserting the square root, if you want to use the dot multiplication symbol between 4acs, you can select the "Mathematical Point" symbol in the "Operation Symbol" template. The Operation Symbol template includes various operation symbols, such as addition, subtraction, multiplication, division and cyclic addition. After the formula on the left is completed, we need to insert a less than or equal to sign. Open the relationship symbol template, and then click the symbol "Less than or equal to". Finally, we repeat the above process, enter the score on the right, click the left mouse button outside the formula box, and the formula for finding the root of the unary quadratic inequality is completed.
(2) Set relation
Set relation is also something we often encounter. The following set relation involves union with subscript. To enter Greek letters, union symbols and ellipsis, all these can be done with symbols on the formula toolbar.
In the Word document, position the cursor where you want to insert the set relation, and open the formula toolbar. First, insert a union with subscripts. Single "Product and Set Theory Template" button, select "Union of Intermediate Subscript and Intermediate Subscript Limit" symbol. After inserting the union symbol, there are three virtual boxes on its right and up and down, indicating that we need to input content in these three positions. First, the cursor stays on the right side of the symbol. Use the arrow keys ↑, ↓ and → on the keyboard to move the cursor position and complete the input of the upper and lower limits. When entering Greek letters, you need to use two templates: Greek letters (lowercase) and Greek letters (uppercase) on the toolbar. You still need to enter the union symbol on the right side of the equation, but this union symbol is slightly different from the one on the left; You don't need to enter anything above, below or to the right. We can use the union symbol in the Set Theory Template, and the ellipsis in the equation can use the ellipsis in the Spacing and Ellipsis Template. In addition, when writing a formula in the formula box, the space bar does not work. To insert spaces in a formula, you must use the spacing symbols in the Spacing and Ellipsis template, which provides several symbols with different spacing. After the above operations are completed, the input of the setting relationship is completed.
(3) Geometric derivation
There is also a kind of geometric problem in mathematics that we often encounter, such as the derivation process of two angles being equal. The symbols we don't use here are: because, so, angle and vertical. Symbols are often used when "because" and "so" come from geometric problems. These two symbols are provided in the logical symbol template. Vertical symbols and angle symbols can be found in the "Other symbols" template. Enter the first line and press enter. To make the format look good, the second line should be blank. I talked about interval symbols before. Select the symbol of "whole body spacing" in the template of "spacing and ellipsis" to enter "OA=OB".
Finally, I want to mention the triangle symbol that is often used in geometry, which can be represented by the Delta symbol in the "Greek letter (capital)" template.
Insert physical formula
The input of physical formula is similar to that of mathematical formula. Only common vector symbols are mentioned here. How to insert the arrow above F? There is a Decorative Symbol template in the formula toolbar. After entering f, you can add a vector arrow at the top of the force "f" by selecting the "right simple arrow" symbol on the template.
On the formula toolbar, you can also use the bottom top line template to add a vector arrow by selecting the right arrow top line symbol in the template first, and then entering f, which is different from adding a vector arrow with the "Decorative Symbol" template in that after adding an arrow with the "Decorative Symbol" template, the vector symbol and the vector arrow are separated and the arrow can be deleted separately. However, after adding arrows using the Bottom Line Top Line Template, they are a whole and will be deleted at the same time.
Change the appearance of the formula
In the formula we introduced, some letters and numbers are italicized, while others are not. Word can automatically italicize letters, but the numbers remain the same. In fact, just like ordinary text in Word, whether the characters in the formula are italicized, bold and the size of the subscript font size is up to us.
When we edit the formula in the formula box, the toolbar of the Word window has changed a little, leaving only the menu bar, and its content has also changed a little. First, open the Style menu, and then click the Define command to open the Style dialog box. By default, variables and lowercase Greek letters are italicized. In this dialog box, you can specify which part of the formula can be italicized and which part can be bold.
Let's see how to change the font of the formula. Click Define on the Size menu to open the Size dialog box. You can see that different symbols of the formula have default size settings. If you point the cursor at the subscript/superscript on the left and click it, the preview box on the right will show which part of the formula the subscript and superscript belong to. To change the size, simply enter a new point in the text box.