第1个回答 2020-05-14
答案是
511125
可以分开计算
125分成100和25
第2个回答 2020-05-15
l25x47X87=47x125㐅80十47x125X7
=47x10000+47x125x(8一1))
=470000+47xl25x8-47ⅹ125
=470000+47000-40ⅹ125-7ⅹ125
=517000-5000-8x125+125
=517000-5000-1000+125
=511000+125
=511125
第3个回答 2020-05-15
调整运算顺序
=125*8*47
=1000*47
=47000 即为所求
第4个回答 2020-05-15
=125(50-3)*87
=(6250-375)87
=5875*87
=5875(90-3)
=5875*90-5875*3
=528750-17625
=511125