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Showing Results for add and subtract

Here's an activity that will get your child's attention with a back-to-school shopping spree. He'll use decimal skills to add, subtract, multiply, and divide!

Go Shopping for Decimal Practice!

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Does Adding Salt to Pasta make it Cook Faster?

This activity with add some fun and education to long car trips. Perfect for family vacations!

Engage Your 5th Grade Traveler!

Here's an interactive, fast-paced game that will make your fifth grader feel more comfortable with simple equations.

The Amazing Equation Race

This science fair project idea examines whether adding gelatin causes a solid  to have a higher melting point and/or melt slower.

Does Gelatin Slow Down the Melting of Freezer Pops? 

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Water Purification Experiment: Removing Chlorine From Water

Use a deck of playing cards to practice place value and other math concepts with your upper elementary child!

The Place Value Game

In this activity, your child will get a review of addition, subtraction, multiplication and division using classic domino pieces.

Play Domino Deal for Math Review!

Instead of loading up on mayonnaise based potato salad, your child can whip up something healthier: German potato salad!

German Potato Salad

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Does Liquid Weigh More after Freezing and Boiling?

Use this great no-bake recipe to save energy and keep cool.

Blueberry Cheesecake

This entertaining magic trick will 'trick' kids into using math skill to impress their friends!

Equation Magic

The crust is fun for kids to mix and roll out, and the filling overflows with vitamin and anti-oxidant packed berries!

Blackberry Pie

Your child can turn cookie dough into a big pile of colorful painted fall leaves ready for eating!

Bake Fall Leaf Cookies

Toss playing cards into boxes while you practice addition and multiplication with decimals in this fun, fifth grade math game.

In the Box

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

Does Temperature or Concentration Affect pH?

Celebrate Dia de los Muertos by baking pan de muerto. In this 5th-6th grade activity, your child will explore another culture while learning about baking.

Pan de Muerto Recipe

A tall glass of lemonade is the perfect summer treat. Make it even better with these creative twists on classic lemonade!

Lemonade Recipes

This hands-on activity gives your child an opportunity to apply various strategies to solve a problem and to check if his answer makes sense.

Tip the Scales for Estimation

Did you know cooking supports your child in learning complex math skills? Reinforce your child's measurement and problem solving skills by whipping up some healthy sweet potatoes for a dinner side dish!

Stuffed Sweet Potatoes

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

How Does Salinity and Temperature Affect the Density of Water?

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Evolution of Gas from Yeast

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Growing Bacteria

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

Make Ice Cream in a Baggie!

Science fair project that examines condensation and the conditions needed in order for dew to form.

Dew Point, Humidity and Weather

Teach children how to upcycle dried-out markers with this homemade paint-making activity!

Reuse Markers to Create Liquid Watercolors

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Heat Convection in Liquids

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

Determining Mold and Mechanical Deterioration Risk for an Artifact Storage Box

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

Foam It! Cause a Chemical Reaction

Any time is the perfect time to whip up a delicious batch of fluffy pumpkin cookies.

Pumpkin Cookies

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