Round to the nearest ten thousandth

I am stuck on these problems, how do i round them to the nearest ten thousandth

1) 1.89166815

2) -2.807354922

3) .724160441

he did thousandths^^^^
1) 1.8917
2) -2.8074
3) .7242

1) 1.892

2) -2.807

3) .724