奥数专题之速算与巧算1 标签：工程问题
<p>1．计算1.135+3.346+5.557+7.768+9.979=_____.</p><p>2.计算1.996+19.97+199.8=_____.</p><p>3.计算9.8+99.8+999.8+2023.8+20239.8=_____.</p><p>4.计算6.11+9.22+8.33+7.44+5.55+4.56+3.67+2.78+1.89=_____.</p><p>5.计算1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19=_____.</p><p>6.计算2.894.68+4.686.11+4.68=_____.</p><p>7.计算17.2023-17.2023+17.2023=_____.</p><p>8.计算1.250.322.5=_____.</p><p>9.计算754.7+15.925=_____.</p><p>10.计算28.2023+3.2023.7+573.40.05=_____.</p><p>11.计算172.46.2+20230.38.</p><p>12.计算3.17-2.74+4.7+5.29-0.26+6.3=_____.</p><p>13.计算(5.25+0.125+5.75)8=_____.</p><p>14.计算34.58.23-34.5+2.2023.5=_____.</p><p>15.计算6.250.16+2023.2023+5.26.25+0.20230=_____.</p><p>16.计算0.202335+0.035+30.035+0.20230.5=_____.</p><p>17.计算19.2023-199.81.9+20230.82=_____.</p><p>18.计算13.59.9+6.510.1=_____.</p><p>19.计算0.2023.250.564=_____.</p><p>20.计算11.843-2023.09=_____.</p>
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