Rounding Numbers: Exercises: Rounding to the Nearest Tenth and Hundredth
This clip provides examples of how to round to the nearest tenth or hundredth. The clip explains that the procedure is basically the same in either case, except that, when rounding to the nearest tenth, it's necessary to look to the hundredths place...
Rounding Numbers: Rounding Numbers to the Nearest Unit
This clip talks about the use of rounding in measuring distances to the nearest whole number, rather than to the nearest tenth.
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.
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.
Weight and Temperature: Fahrenheit and Celsius: Practical Problems
This clip provides practical problems that are solved by applying the formulas for converting between Fahrenheit and Celsius.
Weight and Temperature: Fahrenheit, Celsius and Formulas for Temperature Conversion
This clip introduces the measurement of temperature, explaining the terms Fahrenheit and Celsius in the process. The clip also explains how to convert from one to the other. "To convert from Celsius to Fahrenheit," the clip states, "
we use the for...
Weight and Temperature: Units of Weight and Unit Equivalences
This clip presents the units of weight in the U.S. Customary System, then provides a number of practical problems that can be solved by using the equivalences for ounce, pound and ton.
Square Roots: Using a Square Root Table
This clip explains that all numbers have a square root, but not all square roots are whole numbers; many are decimals. The clip then states that, "
there are ways to figure out square roots, but none of them are very pleasant, and people hardly eve...
Square Roots: Useful Trick Involving Square Roots, A
This clip explains what it calls a useful trick that makes it possible for us to get "
extra mileage out of the square root table." The clip says that if we can factor a number into smaller factors, we can find its square root by multiplying togeth...
Length: Converting Meters to Feet and Kilometers to Miles
This clip presents practical problems in which meters must be converted to feet, and kilometers must be converted to miles. In the first problem, the student must determine how many feet of telephone cord are on a 100-meter roll. "We'll use the deci...