Round 2.17575968717 to the nearest millionth

2.1758

Step-by-step explanation:

Millionth is the fourth decimal unit. 0. 0 0 0 1

In the number 2.17575968717, the millionth place is 2.175 7 5968717

Check the number next to it. If it's 5 or more then add the underlined number by 1. If not then leave it as it is.

Here,

175 7 5

5 is following 7 and 5 is considered more so add 1 to 7.

175 8

Then put zeros (or not) following 8.

2.1758000000