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: Summary: Adding Signed Numbers
This clip summarizes how to add signed numbers. It reviews two important rules, one pertaining to addition when the addends have the same sign, the other to addition when the addends have different signs. The clip also revisits the addition of 3 or ...
Multiplying Signed Numbers: Multiplying Three or More Signed Numbers
This clip explains that, when multiplying three or more signed numbers, if the number of negative factors is even, the product is positive. If it's odd, the product is negative.
Signed Fractions: Exercise on the Absolute Value of Fractions
This clip explains that, like signed whole numbers, signed fractions have absolute values "
and they work in exactly the same way. For example, the absolute value of 6/7 is just that, 6/7, but the absolute value of negative 6/7 is also 6/7."
Signed Fractions: Multiplying Signed Fractions
This clip explains that the freedom to move the negative sign out front makes multiplication of signed fractions exactly like multiplication of any signed numbers.
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.
Adding Signed Numbers: Adding Numbers With Different Signs
This clip explains the rule for adding numbers with different signs. "Subtract the absolute value of the addends to get the absolute value of the answer," the clip advises. "As for the sign of the answer, it's the same as the sign of the addend with...
Adding Signed Numbers: Adding Two or More Numbers With the Same Sign
This clip explains that when adding two or more numbers with the same sign, to get the absolute value of the answer, we add the absolute value of the addends. "As for the sign of the answer," the clip continues, "
it's the same as the sign of the a...