Signed Numbers: Number Line Exercises
This clip offers practice in locating a set of numbers known as "the set of integers" on the number line. The clip explains that the integers include zero, but don't include any fractions, positive or negative.
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: 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 7?" the clip asks. Because p...
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...
Subtracting Signed Numbers: Exercise in the Subtraction of a Negative Number, An
This clip provides an exercise in which the student must solve a subtraction problem involving a negative number. The clip includes the steps necessary to solve the problem, as well as the correct answer.
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: Subtracting a Larger Number From a Smaller Number
This clip explains the steps necessary to solve a problem in which a larger number is subtracted from a smaller number.
Dividing Signed Numbers: Introduction to Dividing Signed Numbers
This clip explains that the rules for dividing signed numbers are the same as for multiplying signed numbers, "
except, of course, that we divide the absolute values instead of multiplying." When the signs are the same, the quotient is positive. Wh...
Dividing Signed Numbers: Dividing Positive by Positive and Negative by Negative
This clip explains that, when dividing signed numbers, if the divisor and dividend have the same sign, the quotient is positive.