(72+23)×(85-27)
= 95×(85-25-2)
= (100-5)×(60-2)
= 100×60 - 2×100 - 5×60 + 5×2
= 6000 - 200 - 300 + 10
= 6000 - 500 + 10
= 5510那是小学四年级的题目那就改成(72+23)×(85-27)= 95×(85-25-2)= 95×(60-2)= 95×58= (100-5)×58= 100×58- 5×58 = 5800 - 290= 5510