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· 33字 · 1分钟
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207÷9=23 62.92+73.93=136.85 83.78+17.86=101.64
90×36+16=3256 25+55=80 31-(5÷5)=30
73.01-7.89=65.12 64-62=2 (31×6)+43=229
82×191=15662 65.3-61.65=3.65 42÷6+82=89
74+(38×50)=1974 (99-92)×72=504 74÷2+95=132
98.17-47.6=50.57 91-11=80 156×5=780
(85×26)+22=2232 324÷9=36 34+(33×26)=892
39.09+89.34=128.43 90÷5=18 41×49=2009
$\frac{9}{38}$+$\frac{11}{38}$=$\frac{20}{38}$ $\frac{8}{62}$+$\frac{13}{62}$=$\frac{21}{62}$ $\frac{4}{31}$+$\frac{2}{31}$=$\frac{6}{31}$
$\frac{4}{11}$+$\frac{4}{11}$=$\frac{8}{11}$ $\frac{55}{64}$-$\frac{7}{64}$=$\frac{48}{64}$ $\frac{79}{88}$+$\frac{2}{88}$=$\frac{81}{88}$