Answer
$0.97$
Work Step by Step
Using the order of operations, we first have to evaluate the exponent:
$1\div2^{2}-0.54+1.26 = 1\div4-0.54+1.26$.
Next is division:
$1\div4-0.54+1.26=0.25-0.54+1.26$.
Now simply work from left to right:
$0.25-0.54+1.26=-0.29+1.26=0.97$.