add -1\\frac{1}{4}+0.75 + 0.45. write your answer as a decimal to the nearest hundredth.

Explanation:

Step1: Convert mixed - number to decimal

$-1\frac{1}{4}=-1 - \frac{1}{4}=-1 - 0.25=-1.25$

Step2: Add the decimals

$-1.25 + 0.75+0.45=(-1.25 + 0.75)+0.45=-0.5 + 0.45=-0.05$

Answer:

$-0.05$