5050-100-99-98-97-96-95-94-93-92-91-90-89-88-87-86-8
=5050-100-(99+91)-(98+92)-(97+93)-(96+94)-(95+85)-90×4-3
=5050-100-190×5-90×4-3
=3637
题目应该还有-85-84-83-82-81
解:5050-(100*10)-(90*10)-(1+9+2+8+3+7+4+6+5)*2
=5050-1000-900-45*2
=5050-1900-90
=3040
5050-(100+86)*7-93-8=3647
满意请采纳
5050-(86+100)*15/2+8