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· 35字 · 1分钟
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20.53+70.55=91.08 6×(96-9)=522 66+(34×6)=270
82×36+9=2961 98.36-3.92=94.44 73+21=94
48.48+30.77=79.25 31.34+43.73=75.07 81.75-70.28=11.47
12×152=1824 84÷4-19=2 23.36+68.64=92.0
20×29-46=534 76+(12÷2)=82 53+30=83
146×47=6862 459÷9=51 (76×62)+65=4777
81-80=1 784÷8=98 114÷6=19
86+(98×74)=7338 498÷8=62 …… 2 36-(91÷7)=23
$\frac{19}{55}$+$\frac{2}{55}$=$\frac{21}{55}$ $\frac{5}{9}$+$\frac{1}{9}$=$\frac{6}{9}$ $\frac{59}{96}$-$\frac{30}{96}$=$\frac{29}{96}$
$\frac{33}{40}$+$\frac{7}{40}$=1 $\frac{82}{87}$-$\frac{1}{87}$=$\frac{81}{87}$ $\frac{2}{31}$+$\frac{9}{31}$=$\frac{11}{31}$