Naming Whole Numbers: Face Value and Place Value
This clips explains that every digit makes sense in two different ways at the same time. It makes sense according to which digit it is, which is known as face value, and it makes sense according to where we decide to put it, which is known as place ...
Naming Whole Numbers: System of Decimal Numerals, The
This clip talks about whole numbers and the system that was developed so that they could be written and spoken. It's known as the system of decimal numerals, based on symbols called digits.
Negative Exponents: Expanded Notation and Negative Exponents
This clip explains the use of negative exponents in expanded notation as a way of getting rid of fractions. As an example, the clip states that, "
7 times 1 over 10 becomes 7 times 10 to the power of negative 1. 8 times 1 over 10 to the power of 2 ...
Naming Whole Numbers: Separating Large Numbers Into Periods
This clip explains the use of commas to organize the digits within a number into groups or periods.
Naming Whole Numbers: Expanded Notation
This clip explains that when we write a numeral using words such as "hundreds," "tens" and so on, or numbers like, say, "700," "80," and "9," we are using expanded notation, which makes it much easier to add, subtract, multiply and divide whole numb...
Multiplying Whole Numbers, Part 2: Multiplication Facts For 6, 9, and 7
This clip explains that, now that we can multiply by 3, multiplying by 6 is easy because, "
it's just a matter of taking steps twice as big." It goes on to say that "
the 9's facts are in a class by themselves," explaining that, with the exception...
Multiplying Whole Numbers, Part 2: Memorizing the Multiplication Facts With Tables
This clip advises that, even with the full multiplication table filled in, the real work is just beginning, because it's necessary to commit the multiplication facts to memory. The clip then provides strategies for how to approach this task, suggest...
Naming Whole Numbers: Summary: Naming Whole Numbers
This clip summarizes how whole numbers are named, and in the process covers decimal numerals, whole numbers, face value, place value and expanded notation.
Dividing Decimal Fractions: Dividing Decimals: Four Different Outcomes
This clip presents four different outcomes that may occur when dividing decimals: The first possibility is that the division comes out even "just as it stands, with no remainder." The second possibility is that the division comes out even only after...
Rounding Numbers: Rounding to the Nearest Tenth
This clip explains the procedure used in rounding to the nearest tenth. "The place to look is the hundredths place," the clip explains. "If it's less than five, leave the tenths place unchanged and drop everything to the right. If it's five or more,...