Question

201的平方减51的平方加253乘851 简便计算

201² -51² + 253 × 851=? 过程（简便计算) 谢谢！

Answer 1

201² -51² + 253 × 851
=（201+51）×（201-51）+253 × 851
=252×150+253 × 851
=252×150+（252+1 ）× 851
=252×150+252×851+851
=252×（150+851）+851
=252252+851
=253103

Answer 2

201² -51² + 253 × 851
=(201+51)(201-51)+253× 851
=252×150+(252+1)×851
=252×(150+851)+851
=252×1001+851
=252×(1000+1)+851
=252000+252+851
=252000+(250+850)+3
=252000+1100+3
=253103

Answer 3

201² -51² + 253 × 851
=40401-2601+253×851
=40401-2601+215303
=37800+215303
=253103