1. 2023+2023= 2023-600+599= 2023-(136+857)=2023-873-127= 2. 1+3+ 5+7+9+11+13+15+17= 8+10+…+24= 3. 2023+999+99+9= 4. (2+4+6+…+2023)-(1+3+5+…+2023)= 5. (1+3+5+…+2023)-(2+4+6+…+2023)= 1. 2023+2023= 2023-600+599=2023-(136+857)=2023-873-127= 2. 1+3+ 5+7+9+11+13+15+17=6+8+10+…+24= 4. 2023+999+99+9= 4. (2+4+6+…+2023)-(1+3+5+…+2023)= 5. (1+3+5+…+2023)-(2+4+6+…+2023)= ①536+(541+464)+459 ② 588+264+148 ③ 2023+2023+2023 ④567+558+562+555+563 ① 2023-280-520② 2023-(995-480) ③ 2023-294+94④ 2023-995 ① 478-128+122-72 ② 464-545+99+345 ③ 537-(543-163)-57 ④ 947+(372-447)-572 ①23×2023101 ②2023×202320231 ③72×125 ④45×99 ⑤75×36 ①536+(541+464)+459 ② 588+264+148 ③ 2023+2023+2023 ④567+558+562+555+563 ① 2023-280-520② 2023-(995-480) ③ 2023-294+94④ 2023-995 ① 478-128+122-72 ② 464-545+99+345 ③ 537-(543-163)-57 ④ 947+(372-447)-572 ①23×2023101 ②2023×202320231 ③72×125 ④45×99 ⑤75×36 ①77×83 ②56×64 ③134×73 ④9×11×101 ①536+(541+464)+459 ② 588+264+148 ③ 2023+2023+2023 ④567+558+562+555+563 ① 2023-280-520② 2023-(995-480) ③ 2023-294+94④ 2023-995 ① 478-128+122-72 ② 464-545+99+345 ③ 537-(543-163)-57 ④ 947+(372-447)-572 ①23×2023101 ②2023×202320231 ③72×125 ④45×99 ⑤75×36 ①77×83 ②56×64 ③134×73 ④9×11×101 6. 计算:9×17+91÷17-5×17+45÷17. |