Subtracting Signed Numbers: Subtracting a Negative Number From a Positive Number
This clip explains the steps necessary to solve a problem in which a negative number is subtracted from a positive number.
Subtracting Signed Numbers: Subtraction as Finding Missing Addends
This clip explains that subtraction can be looked at in either of two ways: having some quantity and taking away part of it, or finding the missing addend. "We have 4 dollars (and) we need 7. What must we add to 4 to get..
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 ..
Subtracting Signed Numbers: Using the Number Line to Subtract Signed Numbers
This clip explains how students can use the number line to more easily understand the subtraction of negative numbers. The clip also points out that one of the reasons signed numbers were invented " (was so that) we can..
Subtracting Whole Numbers: Borrowing
This clip uses expanded notation to demonstrate the technique known as borrowing in subtracting both two and three-digit numbers.
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.
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 m..
Subtracting Whole Numbers: Subtraction Problems May Not Be Rearranged
This clip explains that, while the addends can be rearranged or regrouped in addition without affecting the answer, the same is not true in subtraction.
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, explaini..
Subtracting Whole Numbers: Using Addition to Check Your Answers
This clip explains how addition can be used to verify that the answer to a subtraction problem is correct.