Using Addition and Subtraction

Positive and negative numbers are everywhere in the world around us. Whether it's charged particles in atoms, a hot air balloon rising and falling in the sky, or a series of bills and checks being delivered in the mail, this...

What is a quick comparison, and how can it help you estimate sums and differences? For this estimation worksheet, learners estimate fractions in addition problems. They complete four problems where they estimate the sums after reviewing...

For this adding and subtracting decimals instructional activity, students add and subtract numbers with decimals in word problems. Students complete 12 word problems.

Here is an adding and subtracting decimal hundredths worksheet in which learners add and subtract numbers that have decimals in the hundredths. They complete 32 problems where everyone adds and subtracts numbers that have decimals in the...

Guide young mathematicians through the crazy world of negative numbers with a handy reference document. Offering clear instructions for adding and subtracting positive and negative integers, this resource is a great way to...

Captivate your class by having them find the value of their names, different zoo animals, musical instruments, etc.,with a mental math lesson. Using the coding formula listed, children learn to fluently estimate and calculate...

Estimating is an essential skill used in everyday life. This presentation explains how to apply prior knowledge about rounding numbers to estimating sums and differences. Example problems and assessment include large numbers, making this...

Charley and Professor Perez show us how to add numbers in a variety of ways. They use a number line to show how the various methods work. This clip shows learners that there are multiple ways to solve any addition problem. Intended for...

Students demonstrate how to solve addition and subtraction of fractions. In this fractions lesson plan, students use folded paper to shade in fractional parts and identify the sum of the parts shaded.

Fifth graders put their fraction knowledge to work by reading word problems and deciding whether to add or subtract the given fractions. Terms such as combined, total, difference, and left indicate which operation to use.