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.
Signed Fractions: Solving Equations Whose Solutions Are Negative Numbers or Fractions
This clip explains that, now that we understand signed numbers and fractions, we can solve equations whose solutions are not necessarily whole numbers. The clip states that, "
in general, it doesn't matter whether our equations involve positive or ...
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: Pairs of Numbers Whose Sum is Zero
This clip explains that any time we add 2 numbers with the same absolute value, but opposite signs, their sum will be zero.
Adding Signed Numbers: Adding Negative Numbers
This clip explains the rule for adding two negative numbers: to get the absolute value of the answer, add the absolute values of the addends. "As for the sign of the answer," the clip continues, "
it's the same as the sign of the addends."