addition and subtraction equations

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing variables and constants.

Front

What does the variable 't' represent in the equation t - 19 = 33?

Back

The variable 't' represents the starting temperature before it dropped by 19 degrees.

Front

How do you solve the equation t - 19 = 33?

Back

To solve for t, add 19 to both sides: t = 33 + 19, so t = 52.

Front

What is the inverse operation of subtraction?

Back

The inverse operation of subtraction is addition.

Front

What does the variable 'n' represent in the equation n - 4 = 12?

Back

The variable 'n' represents the total number of cookies my cousin had before giving away 4.

Front

How do you solve the equation n - 4 = 12?

Back

To solve for n, add 4 to both sides: n = 12 + 4, so n = 16.

Front

What is the equation that represents the situation: Jack had some markers and then bought 6 more. Now he has a total of 10 markers?

Back

The equation is m + 6 = 10, where m is the number of markers Jack originally had.

Front

How do you solve the equation m + 6 = 10?

Back

To solve for m, subtract 6 from both sides: m = 10 - 6, so m = 4.

Front

What is the relationship between addition and subtraction?

Back

Addition and subtraction are inverse operations; adding a number undoes the effect of subtracting that same number.

Front

What does the equation 33 - 19 = t represent?

Back

This equation represents finding the starting temperature (t) after a drop of 19 degrees from 33 degrees.