Question

$\sqrt{1.69} = \square$

Explanation:

Step1: Recall square root definition

We need a number $x$ such that $x^2 = 1.69$.

Step2: Test decimal values

Note that $1.3 \times 1.3 = 1.69$, so $\sqrt{1.69} = 1.3$.

Answer:

1.3