Evaluate
-402
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-402
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\frac{643.2}{-1.6}
Add -87.3 and 85.7 to get -1.6.
\frac{6432}{-16}
Expand \frac{643.2}{-1.6} by multiplying both numerator and the denominator by 10.
-402
Divide 6432 by -16 to get -402.
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