Evaluate (-2/1)(1/2)

Math
(-21)(12)
Move the leading negative in -21 into the numerator.
-21⋅12
Factor 2 out of -2.
2(-1)1⋅12
Cancel the common factor.
2⋅-11⋅12
Rewrite the expression.
-1
Evaluate (-2/1)(1/2)

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