Adding and Subtracting Rational Numbers

Write this fraction as a decimal.
$$\frac{1}{9}$$

−30 + 10

−28 + −8

$$\frac{8}{15}$$  +  - $$\frac{6}{15}$$

  $$\frac{1}{4}$$  − (- $$\frac{3}{4}$$ )

Ryan needs $$\frac{3}{4}$$ cup of sand for a science project. He already has $$\frac{1}{3}$$ cup of sand in his garage. How many more cups of sand does he need? Select the operation and answer.

An elevator is on the 10th floor. It goes down 6 floors and then up 4 floors. What floor is the elevator on now?

7.19 + -5.34

Nadia recorded a temperature of 81°F this morning for science class. The temperature increased $$3\frac{1}{4}$$ °F in the afternoon before decreasing 4.6°F in the evening. What was the evening temperature, in degrees Fahrenheit?

- $$1\frac{1}{4}$$  + - $$2\frac{1}{2}$$