3999十399.9十39.99十3.999十3.111用简便方法计算

3999十399.9十39.99十3.999十3.111用简便方法计算
2024-11-16 22:22:32
推荐回答(4个)
回答(1):

=3999+1+399.9+0.1+39.99+0.01+3.999+0.001
=4000+400+40+4
=4444

.001

回答(2):

3999十399.9十39.99十3.999十3.111
=3999+1+399.9+0.1+39.99+0.01+3.999+0.001+2
=4000+400+40+4+2
=4446

回答(3):

=3999+400-0.1+40-0.01+4-0.001+3.111
=(3999+400+40+4)+(3,111-0,1-0,01-0,001)
=4443+3
=4446

回答(4):

4000-1+400-0.1+40-0.01+4-0.001+3+0.1+0.01+0.001
=4444+3-1=4446