00:56
Multiplying Signed Numbers: Other Ways of Indicating Multiplication by Signed Numbers
This clip explains that signs can sometimes be confused with orders to add or subtract. To avoid this, signed numbers are sometimes enclosed in parentheses. And, in some instances, if both factors are in parentheses, "
we sometimes leave out the mu...
01:02
Multiplying Signed Numbers: Fourth Exercise in Multiplying Signed Numbers
This clip provides the student with a few final exercises in multiplying signed numbers. It notes that, "
if you made any mistakes
you can't do much with multiplying signed numbers if you forgot ordinary multiplication."