Question

1999+2999+3999+4999+5999+6999+6999+8用简便方法算

Answer 1

简便方法计算如下：
1999+2999+3999+4999+5999+6999+6999+8
= 2000 + 3000 + 4000 + 5000 + 6000 + 7000 + 7000 + 1
= 1000×(2 + 3 + 4 + 5 + 6 + 7 + 7) + 1
= 1000×34 + 1
= 34001

Answer 2

把8都拆成1
（1999+1）+（2999+1）+（3999+1）+（4999+1）+（5999+1）+（6999+1）+（6999+1）+1=34001

Answer 3

1999+2999+3999+4999+5999+6999+6999+8

= 2000 + 3000 + 4000 + 5000 + 6000 + 7000 + 7000 + 1

= 1000*(2 + 3 + 4 + 5 + 6 + 7 + 7) + 1

= 1000*34 + 1

= 34001

Answer 4

1999+2999+3999+4999+5999+6999+6999+8
=1999+1+2999+1+3999+1+4999+1+5999+1+6999+1+6999+1+1
=2000+3000+4000+5000+6000+7000+7000+1=34000+1
=34001

Answer 5

1999+2999+3999+4999+5999+6999+6999+8=(1999+1)+(2999+1)+(3999+1)+(4999+1)+(5999+1)+(6999+1)+(6999+1)+1=2000+3000+4000+5000+6000+7000+7000+1=34001