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 ...
Multiplying Whole Numbers, Part 2: Summary: Multiplying Whole Numbers, Part Two
This clip summarizes some of the key points about multiplication, touching on the concept of the number line, arrays, and the importance of looking at the units place of products. The clip also points out some of the interesting facts pertaining to ...
Dividing Whole Numbers, Part 2: Partial Quotients and Multiples of Ten
This clip explains how understanding and learning powers of ten and learning multiples of ten can reduce the number of partial quotients needed to solve a division problem.
Rounding Numbers: Rounding Whole Numbers
This clip explains that decimals aren't the only numbers that can be rounded. "Whole numbers can also be rounded," the clip points out. Examples are then provided to show how that's done.
Adding and Subtracting Decimal Fractions: Summary: Adding and Subtracting Decimal Fractions
This clip summarizes the main points of adding and subtracting decimal fractions. It revisits the idea that adding decimal fractions depends on lining up the addends by place value. The clip says that the easiest way to do this is by lining up the d...
Adding and Subtracting Decimal Fractions: Lining Up Numbers on the Decimal Point
This clip explains the importance of lining up the addends by place value when adding decimal fractions. It notes that every decimal fraction has a decimal point and, "
if we line up one column, all the rest line up automatically. Tens, units, tent...
Adding and Subtracting Decimal Fractions: Five Steps For Adding Decimal Fractions
This clip explains the five-step sequence that should be followed when decimal fractions are added: first, put in any missing decimal points; second, write the addends in the column lining up the decimal points; third, fill in the gaps on the right ...
Addition of Whole Numbers, Part 2: Carrying
This clip explains what it means to carry when adding multi-digit whole numbers.
Rounding Numbers: Summary: Rounding Numbers
This clip summarizes rounding numbers, explaining that, "
we use rounded numbers either when it's not important to know the exact ones, or when we can't find them." The clip then explains when and how we round up or down.