Question

148*63+465*450+83*37+465*55-63*65的简便方法？

Answer 1

148×63+465×450+83×37+465×55-63×65
＝63×（148-65）+63×37+20×37+465×（450+55）
＝63×（83+37）+740+465×505
＝63×100+63×20+740+465×500+465×5
＝6300+700+1260+40+232500+2325
＝7000+1300+234825
=243125

Answer 2

148*63+465*450+83*37+465*55-63*65的简便计算，可以这样做：
148×63+465×450+83×37+465*55-63×65
=148×63-63×65+465×450+465*55+83×37
=63×(148-65)+465×(450+55)+83×37
=63×83+465×505+83×37
=83×(63+37)+465×(500+5)
=8300+232500+2325
=8000+300+232000+500+2000+325
=8000+232000+2000+300+500+325
=242000+1125
=243125

Answer 3

148×63+465×450+83×37+465×55-63×65
=63×(148-65)+465×(450+55)+83×37
=63×83+465×505+83×37
=83×(63+83)+465×505
=83×146+465×505
=12118+234825
=246943