8+9+10+11+12+13+14
=(8+14)+(9+13)+(10+12)+11
=22×3+11
=66+11
=77
8+9+10+11+12+13+14的简便方法计算
8+9+10+11+12+13+14
=11*7
=77
答等于77
8+9+10+11+12+13+14
=(8+14)+(9+13)+(10+12)+11
=22×3+11
=66+11
=77
8+9+10+11+12+13+14的简便方法计算
8+9+10+11+12+13+14
=11*7
=77
答等于77