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電子課本網(wǎng) 第18頁

第18頁

信息發(fā)布者:
?$=-(5+12)+(8+6)$?
?$=-17+14$?
?$=-3$?
?$=2-[-2+4]$?
?$=2+2-4$?
?$=0$?
?$=7+6+12$?
?$=25$?
?$=\frac {3}{2}×\frac {1}{2}×\frac {2}{9}$?
?$=\frac {1}{6}$?
?$=-\frac {2}{9}+\frac {5}{3}×\frac {7}{15}$?
?$=-\frac {2}{9}+\frac {7}{9}$?
?$=\frac {5}{9}$?
?$=-3×4-1-\frac {1}{8}$?
?$=-12-1-\frac {1}{8}$?
?$=-13 \frac {1}{8}$?
?$=-9+(-12)×\frac {1}{2}+6$?
?$=-9-6+6$?
?$=-9$?
?$=-8×(-6)-\frac {1}{4}×4$?
?$=48-1$?
?$=47$?
?$=-16×\frac {1}{2}+5+2$?
?$=-8+5+2$?
?$=-1$?
?$=-25×\frac {6}{5}×\frac {2}{5}+(-2)×1$?
?$=-12-2$?
?$=-14$?