60005+(36006-28097)100 105-(87007-679)400+80÷4*5800-640÷2÷4

Question

60005+(36006-28097)
100 105-(87007-679)
400+80÷4*5
800-640÷2÷4

Answer 1

1)60005+7909=67914
2)100105-86328=13777
3)400+20×5=400+100=500
4)800-320÷4=800-80=720