Explain how to write an equation when given a description of a mathematical problem or real-world scenario.

In general, look for key words like "is" and "are,"  or "be." These become the equal sign in the equation.

Other key words to help decide which operation to use:

"And," "plus," and "the total of. . ." are clues for addition.

"Difference" or anything that means distance or amount between two given values is a signal for subtraction.

When Linear dimensions are given and Area is to be found, it will be a multiplication equation. The words "times" and "by" usually mean multiply.

Fractions are often multiplied by some other number.

Ratios are usually division problems.

When a total amount is distributed among some number of people, or you need to find out how many people will get a given share or portion, it is a division equation.

Step-by-step explanation:

It's much easier to explain with specific examples. Here is one.

We set up 15 rows of  6 seats in each row. How many seats are there altogether?

Of is the clue for multiplication Are becomes the equal sign.

15 × 6 = ? how many altogether?

90 = the number of seats.

step-by-step explanation:

something over 10 so ? /10

step-by-step explanation: