Students identify the different sources of fossil fuels. For this environmental science lesson, students research about how these impact our environment. They explore renewable energy sources that could replace fossil fuels.

In this geometry worksheet, 10th graders determine the area of irregular polygons.  The one page worksheet contains three problems.  Solutions are provided.

Students identify integers as rational and irrational numbers. For this algebra lesson, students measure and construct number lines using positive and negative integers. They convert between decimals and fractions.

Learners determine the solubility of salt in water at three different temperatures and graph the results. They use the following skills: observing, inferring, and graphing.

In this measurements learning exercise, students review how metric conversions work and the prefixes associated with the conversions. Then students complete 27 problems, 1 short answer, 14 matching, and 7 fill in the blank questions.

In this end of the year math test worksheet, 4th graders complete problems including addition, division, measurement, decimals, and more. Students complete 22 problems. 

Add two numbers that are either whole numbers or written to the tenths place value. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Add two numbers that are written to the ones, tenths, or hundredths place. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Do you know what a decimal is and how it is related to fractions? Find out and practice your skills playing the related interactive games.

Practice adding two decimal numbers from the tenths to the thousandths place.

Add two numbers that are either whole numbers or written to the tenths place value.

In this exercise, students practice adding decimals 0.5. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice adding two numbers that are written to the tenths, hundredths, or thousandths place.

Practice adding two numbers that are written to the tenths, hundredths, or thousandths place. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Add two numbers that are written to the ones, tenths, or hundredths place.

This is a complete lesson with instruction and a variety of exercises, teaching how to add and subtract decimals with one decimal digit (tenths).

Students add decimals on these interactive flashcards. The problem changes color when the correct sum is typed.

Add more challenging whole numbers, tenths, and hundredths like 5.7+4.51 or 47.75+11.98. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Add whole numbers and tenths like 4 + 5.7. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Add tenths like 0.7 + 0.5. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Add larger numbers with tenths like 40.1+7.6 Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this video segment from Cyberchase, Hacker has sabotaged another section of the Madre Bonita Express track; Digit gets help from Deci in adding decimals to find the right size rail that will repair the track.

[Free Registration/Login Required] This fun decimal addition worksheet introduces students to the world of operations with decimal numbers. Fifth graders use models to visualize the addition of numbers in the tenths and hundredths places...

This lesson explains how to add decimals of the tenths place value. Gives practice and games to work on this skill.