奥数专题之速算与巧算3 标签:工程问题
<p>1.37+56+63+44</p><p>2.284+178</p><p>3.89+91+90+92+88+87+93+92+87</p><p>4.2023+2023+2023+2023+98</p><p>5.2023-90-176-10-24</p><p>6.125?13?4?8?25?5?2</p><p>7.2023+999?999</p><p>8.321?654?987?654?987?321</p><p>9.2023?2023+2023?2023</p><p>10.1-2+3-4+5-6+…+2023+2023</p><p>11.947+(372-447)-572</p><p>12.987-178-222-390</p><p>13.325+46-125+54</p><p>14.567+558+562+555+563</p><p>15.100+99-98+97-96+…+3-2+1</p><p>16.(202356+202361+202312+202323+202334+202345)÷6</p><p>17.2023×20232023×20232023</p><p>18.计算:1+2-3-4+5+6-7-8+9+10-…+2023</p><p>19.计算:2023342+202320233×202335- 202334×202336</p>
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