用简便方法计算2+4+6+8+10+12+14+16+18+20

2024-11-26 05:49:11
推荐回答(5个)
回答1:

2+4+6+8+10+12+14+16+18+20
=(2+18)+(4+16)+(6+14)+(8+12)20+10
=20×5+10
=100+10
=110

回答2:

2+4+6+8+10+12+14+16+18+20
=2+20+4+18+6+16+8+14+10+12
=22X5
110

回答3:

2+18+4+16+6+14+8+12+20+10
=20×5+10
=110

回答4:

用简便方法计算:20×5+10=110

回答5:

等差数列