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, "Â…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.
Adding Signed Numbers: Adding More Than Two Signed Numbers
This clip explains that the best way to proceed when adding more than two signed numbers is to add all the positive addends and all the negative addends separately, then add the resulting sums.
Adding Signed Numbers: Practical Problems: Temperature and Distance
This clip provides two short exercises, one dealing with temperature changes, the other with changes in direction, to illustrate how to solve practical problems involving the addition of signed numbers.
Adding Signed Numbers: Using Parentheses in Adding Signed Numbers
This clip explains the use of parentheses to eliminate the confusion that might arise if two signs are written next to each other, as when adding a negative number. The clip notes that we don't run into this problem with positive numbers, because in...
Multiplying Signed Numbers: General Rule for Multiplying Signed Numbers
This clip explains that if two factors with the same sign are multiplied, the product is always positive. When two factors with different signs are multiplied, the product is always negative.
Dividing Signed Numbers: Dividing Positive by Negative and Negative by Positive
This clip explains that, when dividing signed numbers, if the divisor and dividend have different signs, the quotient is negative.
Adding Signed Numbers: Exercise in Adding Signed Numbers
This clip provides exercises to help students better understand how to add signed numbers. It references two rules, one of which is utilized when the signs are the same, the other of which applies when the signs are different.