Curated OER
Doubles and Halves 3
Build mental math skills by teaching learners to double and half three-digit numbers. They start out by doubling one of seven double-digit numbers. Next, they discuss their strategy, and then practice doubling and halving 3-digit...
Curated OER
Understanding Doubles and Halves
Here is a good presentation for young mathematicians. In it, learners practice the skill of doubling numbers by simply multiplying them by two. At first, the problems are easy. By the end of the PowerPoint, they are asked to double...
Curated OER
Number Wall
Use the number wall to practice addition, evens and odds, missing addends, and doubling. Learners answer various questions based on six numbers, filling in squares with digits. They list the odd numbers and total them, then list the even...
Curated OER
Pumpkin Concentration: Doubles Subtraction
Looking for a festive way to practice doubles subtraction? This pumpkin concetration game requires minimal set-up and can be brought out anytime for fun practice. Consider laminating the printed template so they last longer. Partners...
CK-12 Foundation
Finding Exact Trigonometric Values Using Double Angle Identities: Trig Values Using Double and Half Angle Formulas
The more you know, the more you can learn. Scholars apply the double angle and half angle formulas to determine trig values based on known values. They use an interactive that provides sine and cosine values to aid calculations.
Curated OER
Subtracting Half a Double
For this subtraction worksheet, students complete a total of 25 problems, subtract half of a doubled addend. Answers are included on page 2.
Curated OER
Double-Angle and Half-Angle Formulas
In this college level Pre-Calculus worksheet, students use the double-angle and half-angle formulas to evaluate trigonometric expressions and solve trigonometric equations. The six page worksheet contains fifty-six problems. Answers are...
Curated OER
Finding Quarters
How do you find a quarter of a given number? The class will see how easy it can be, as they first find 1/2 of a given set of numbers. They are then encouraged to find 1/2 again, which of course is 1/4. A great strategy for learners just...
CK-12 Foundation
Marie Curie's Classroom
What makes some elements stable and others radioactive? Scholars adjust the number of protons and neutrons in an element then observe its decay. The simulation includes a graphical representation and the chemical formula, as well as...
Curated OER
Using Partitioning to Double or Halve Numbers
Here is an engaging presentation that challenges your mathematicians to use the techniques of partitioning and halving in order to double or half numbers. After each technique is explained, learners are given a series of numbers to try...
Curated OER
Hen and a Half
In this secondary mathematics worksheet, high schoolers solve a riddle/word problem involving a hen and a half laying an egg and a half. The one page worksheet contains one problem with the solution.
Curated OER
Doubling Starter
It is really important to teach kids basic math facts so they can solve more complicated problems later if life. They can practice building number sense and automaticity with this doubling and halving warm up. They are shown a series of...
Curated OER
Doubling and Halving
In this double the numbers and half the numbers worksheet, students problem solve by doubling, complete an input-output table by halving, and play a dice game and doubling the numbers. Students solve 28 problems.
Curated OER
Coloring One Half of a Shape
In this fraction worksheet, learners examine 6 shapes that have been divided in half. Students are instructed to "colour one half" of the shape.
EngageNY
Addition and Subtraction Formulas 2
Knowing the addition formulas allows for the calculations of double and half formulas. The fourth installment of 16 has the class use the addition formula to develop the double angle trigonometric formulas. Using the double formula,...
DK Publishing
Spot the Doubles
Have fun with counting and ladybugs! Kindergartners count the number of spots on the first half of the bug's wings, then double the number to practice their addition skills. Have kids color the ladybugs when they're finished with the...
Illustrative Mathematics
Comparing Products
How can 5th graders show understanding that 30 x 225 is half of 60 x 225 without completing the computation? They can use an area model and draw it out. An array, or an open array, is an area model that allows for young learners to...
Curated OER
Double-the-Design Yarn Paintings!
Learners cut yarn into several different lengths and fold paper in half, using skills for measuring and fractions. Then they use unconventional items (yarn) as tools to create mirror-image art and experience first-hand the math idea of...
Curated OER
Black Tiger Academy Martial Arts Fitness Unit – Lesson 17
“Well begun is half done."—Aristotle. Black Tiger Academy’s martial arts instructional activity 17 of 20 continues to discuss fast foods and their cumulative effects. This instructional activity not only looks at calories, but also at...
EngageNY
Mid-Module Assessment Task: Pre-Calculus Module 4
Challenge scholars to show what they know about properties and addition and subtraction formulas for trigonometric functions. The resource provides a mid-unit check on the progress toward mastery of trigonometric concepts. The areas...
Curated OER
Revise Doubling and Halving
In this doubling and halving learning exercise, students practice doubling 16 three-digit numbers, half 16 three-digit numbers and solve 8 additional division and multiplication math problems.
Curated OER
What is the Nucleus Like?
For this nucleus of an atom worksheet, students answer 19 multiple choice questions about the structure of the atom, radioactive decay, isotopes and half life.
Curated OER
Kinetics
In this kinetics worksheet, students answer a variety of questions. They find reaction rates, determine the order of reactions and they determine rate constants. They calculate the half-life for reactants and they answer questions about...
Curated OER
Visualization of Rhythms in 4/4
First graders investigate musical notes. In this music lesson, 1st graders discuss the values of each note by counting the beats accordingly.