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第13頁(yè)

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?$=-(4×7)$?
?$=-28$?
?$=3×9$?
?$=27$?
=0
?$=9×\frac {2}{3}$?
?$=6$?
?$=\frac {9}{20}×\frac {4}{9}$?
?$=\frac {1}{5}$?
?$=-(\frac {12}{5}×\frac {3}{4})$?
?$=-\frac {9}{5}$?
=-147
?$=10 \frac {1}{5}×\frac {5}{2}$?
?$=\frac {51}{5}×\frac {5}{2}$?
?$=\frac {51}{2}$?
?$=-(5.6×1.2)$?
?$=-6.72$?
?$=3.48×0.7$?
?$=2.436$?
?$=\frac {7}{4}×(-8)$?
?$=-14$?
?$=-(4×1.25)$?
?$=-5$?
?$=\frac {5}{3}×\frac {1}{5}$?
?$=\frac {1}{3}$?
?$=\frac {7}{10}×\frac {15}{4}$?
?$=\frac {21}{8}$?
?$=-(\frac {5}{3}×\frac {12}{5})$?
?$=-4$?
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