20+19+18+17+16+15+14+13+12+11的简便算式

20+19+18+17+16+15+14+13+12+11的简便算式
2025-06-22 18:34:30
推荐回答(2个)
回答1:

问:
20+19+18+17+16+15+14+13+12+11
答:
20+19+18+17+16+15+14+13+12+11
=19+11+18+12+17+13+16+14+15+20
=30+30+30+30+35
=30×4+35
=120+35
=155

回答2:

20+19+18+17+16+15+14+13+12+11
=(20+11)+(19+12)+(18+13)+(17+14)+(16+15)
=31×5
=155