Subtracting Signed Numbers: Summary: Subtracting Signed Numbers
This clip summarizes the lesson on subtracting signed numbers. It explains that "
in subtracting signed numbers, it would be most useful to think of subtraction as finding the missing addend." The clip also reviews the use of the number line in the...
Subtracting Signed Numbers: Subtracting Any Number is the Same as Adding Its Opposite
This clip explains that there's a way to subtract signed numbers that doesn't involve the number line. Through a series of examples, the clip demonstrates that subtracting any number is the same as adding that number with the opposite sign. "In othe...
Subtracting Signed Numbers: Shortcut in Subtracting Signed Numbers, A
This clip takes the student through a 3-step shortcut in subtracting signed numbers. Step 1 is to change the sign of the subtrahend from negative to positive or positive to negative. Step 2 is to change the subtraction to addition. Step 3 is to fini...
Compound Denominate Numbers: Working With Metric Compound Denominate Numbers
This clip explains how working with metric compound denominate numbers differs from compound denominate numbers in the U.S. Customary System. "In the Metric System, we don't usually see a value like 21 meters 72 centimeters," the clip states. "Inste...
Compound Denominate Numbers: Practical Problems: Adding Compound Denominate Numbers
This clip presents a number of practical problems in which compound denominate numbers must be added. The process involves unit conversion to the larger unit where possible.
Compound Denominate Numbers: Working With Compound Denominate Numbers
This clip explains that a denominate number is, "
any number that is written with a unit." The clip notes that compound denominate numbers are numbers that have more than one unit. "When we add compound denominate numbers," the clips states, "
we ...
Equations and Formulas
An introduction to simple algebra with emphasis placed on reading formulas correctly, manipulating formulas, ratios and proportions, and using standard formulas to solve word problems.
Subtracting Whole Numbers: Subtraction Approaches: Take-Away and Missing Addend
This clip explains that subtraction is used to solve two different types of problems. In the first, we start with some things and remove--or take away--some or all of them. The other approach to subtraction, called the missing addend, "
is like goi...
Subtracting Whole Numbers: Summary: Subtracting Whole Numbers
This clip summarizes how subtraction is used in two types of problems: those in which there's a "take-away" and those in which there's a missing addend. It also reviews the link between subtraction and addition, explaining how addition can be used t...
Subtracting Whole Numbers: Practical Subtraction Problems
This clip looks at how subtraction can be used to determine how much more money is needed to buy something, as well as how many more cars will fit in a parking lot.