Adding decimals of different signs word problem Khan Academy 575 03:14
Rational number word problem example 3 Khan Academy 607 04:07
Rational number word problem example 2 Khan Academy 589 02:32
Rational number word problem example 1 Khan Academy 532 03:20
Thinking about whether an expression is positive or negative Khan Academy 513 02:06
Expressions with rational numbers Khan Academy 561 05:58
