Question

(85+86+36+27+95+80+39+75+98)÷9的简便计算？

Answer 1

能被9整除的直接除，其它的数可以凑一下
=(81+4+81+5+99-4+81-1+36+3+72+3+99-1)÷9+4+3
=(4+5-4-1-1+3+7+2+3-1)÷9+7+9+9+11+9+4+11
=14÷9+60
61又
=61又5/9

Answer 2

(85+86+36+27+95+80+39+75+98)÷9
=(80+5+80+6+80+80-5+30+6+30-3+30+9+100-5+100-2)÷9
=[(4x80+6)+(3x30+12)+(2x100-7)]÷9
=(326+102+193)÷9
=621÷9
=69。