SciShow
What's Really Behind The Adderall Shortage?
You may have heard that there's an ongoing shortage of the medication Adderall. But there's a lot more going on here than you may expect, and the real culprit behind the shortage isn't what you might think.
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Mean
The average value of a set of data, calculated by adding all the values and dividing by the number of values. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Singular Possessive Nouns
Mr. Griot explains how to change a singular noun to show possession.
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Commutative and Associative Addition and Multiplication
Mr. Addit applies the commutative and associative properties to both addition and multiplication problems and shows examples.
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Discovering Perimeter
Mr. Addit explains how to calculate the perimeter of a square and a rectangle. He then gives examples of calculating the perimeters of three-sided, five-sided, and six-sided shapes.
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Modeling Word Problems
Mr. Addit explains how keywords help to determine whether a word problem is an addition or subtraction problem. He then models how to solve word problems.
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Regrouping and Carrying
Mr. Addit reviews the terms regrouping and carrying. He then shows examples of adding two two-digit numbers and two three-digit numbers to give examples of regrouping and carrying.
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Commutative and Associative Properties
Mr. Addit reviews the terms commutative property and associative property and shows examples of each.
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Addend, Sum, and Plus
Mr. Addit reviews the terms addend, sum, and plus. He then provides three methods for finding the missing addend in an addition sentence.
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Finding Number Patterns
Mr. Addit reviews the definition of a pattern and explains that to find a pattern in a number sequence, we must first identify the rule. He also demonstrates how to first determine the rule of a number sequence in order to determine the...
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Review for You: Add and Subtract Fractions with Like Denominators
Mr. Addit reviews how to add and subtract fractions that have the same denominator using multiple methods.
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Adding Decimals
Mr. Addit demonstrates how to properly add decimals, both while regrouping and without regrouping.
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Adding and Subtracting Fractions
Mr. Addit explains how we can add and subtract fractions even if they are part of mixed numbers. He demonstrates both adding and subtracting on a number line.
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Add Decimals: Standard
Add Decimals: Standard adds multi-digit decimal numbers to solve word problems by using the standard algorithm.
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Create Sets of Number Patterns
Create Sets of Number Patterns teaches how to create sets of number patterns when given a starting number and two written rules such as “add 6” and “add 3.”
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Adding Fractions with Same Denominators
This video teaches learners about adding fractions with the same denominator.
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Understanding Units and Non-Unit Fractions
This video teaches learners about calculating fractions of amounts looking at unit and non-unit fractions.
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Addition Using the Cross 10 Method
This video teaches learners how to use their knowledge of number bonds when cross ten when adding 2-digit and 1-digit numbers.
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Understanding Adding and Subtracting in Tens
This video teaches learners to add and subtract 10 from 2-digit numbers using a place value grid.
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Exploring Related Facts in Math: Addition and Subtraction
This video teaches learners about related facts.
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Checking Calculations Using Inverse Operations
This video teaches learners how to check their calculations using the inverse operation.
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Exploring Addition and Subtraction Fact Families Within 10
This video teaches learners about addition and subtraction fact families, using part-whole models.
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Exploring Part-Whole Models with Fruits
This video teaches learners how to add numbers within 10, using a part-whole model.