order the numbers from least to greatest

square root of six
-1.2
square root of 4
4.2
-1/4

-1.2, -1/4, square root of 4, square root of 6, 4.2

Ordering the numbers from least to greatest:

-1.2, -1/4, √4, √6, 4.2

To order the numbers from least to greatest, we can arrange them in ascending order.

First, let's identify the values of each number:

Square root of 6 ≈ 2.45
-1.2
Square root of 4 = 2
4.2
-1/4 = -0.25

Now, let's arrange them from least to greatest:

-1.2 < -0.25 < 2 < 2.45 < 4.2

So, the order from least to greatest is:
-1.2, -0.25, 2, 2.45, 4.2