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電子課本網(wǎng) › 第75頁

第75頁

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??$=47×99+47×1$??
??$=47×(99+1)$??
??$=47×100$??
??$=4700$??
?$ ?=40×8×25×1.25?$?
?$ ?=(40×25)×(8×1.25)?$?
?$ ?=1000×10?$?
?$ ?=10000?$?
??$=127÷(2.5×4)$??
??$=127÷10$??
??$=12.7$??
??$=\frac {2}{3}+\frac {1}{6}$??
??$=\frac {4}{6}+\frac {1}{6}$??
??$=\frac {5}{6}$??
??$=\frac {9}{10}÷(\frac {1}{2}×\frac {9}{10})$??
??$=\frac {9}{10}÷\frac {9}{20}$??
??$=\frac {9}{10}×\frac {20}{9}$??
??$=2$??
??$=\frac {4}{5}×(\frac {7}{9}+\frac {2}{9})$??
??$=\frac {4}{5}×1$??
??$=\frac {4}{5}$??
??$=9\frac {9}{20}－\frac {5}{8}+\frac {11}{20}－\frac {3}{8}$??
??$=(9\frac {9}{10}+\frac {11}{20})－(\frac {5}{8}+\frac {3}{8})$??
??$=10－1$??
??$=9$??
??$=(\frac {9}{15}+\frac {5}{15})×\frac {5}{4}+\frac {3}{4}$??
??$=\frac {14}{15}×\frac {5}{4}+\frac {3}{4}$??
??$=\frac {7}{6}+\frac {3}{4}$??
??$=\frac {14}{12}+\frac {9}{12}$??
??$=\frac {23}{12}$??
??$=16.25+6.72－4.25－3.72$??
??$=(16.25－4.25)+(6.72－3.72)$??
??$=12+3$??
??$=15$??
??$ =0.4×(1÷0.05)$??
??$ =0.4×20$??
??$ =8$??
??$=24+45－30$??
??$=39$??
??$=1.68÷(4.8－4.6)$??
??$=1.68÷0.2$??
??$=8.4$??
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