Rational Numbers Review Lesson

Adding Rational Numbers

Adding Rational Numbers

​Find a common denominator.

​​Different signs. Subtract.

​Check the signs of the original numbers.

​Turn the improper fraction into a mixed number.

Adding Rational Numbers

-4.05 + 7.62

7.62

-4.05

3.57

Different signs.​ Subtract.

Line up decimal points and subtract.

​Check the signs of the original numbers.

Multiple Choice

0.65 + (-2.75)

• 2.10

• 3.40

• -2.10

• -3.40

Multiple Choice

-8.15 + (-4.3)

• -12.45

• 12.45

• -3.85

• 3.85

Multiple Choice

$$2\ +\ \left(-\frac{7}{2}\right)$$  

• $$-1\frac{1}{2}$$  

• $$5\frac{1}{2}$$  
  

• $$1\frac{1}{2}$$  
  

• $$-5\frac{1}{2}$$  

Multiple Choice

$$-6\ \frac{1}{3}+\frac{20}{3}$$  

• 13

• $$-\frac{1}{3}$$  

• $$\frac{1}{3}$$  

• -13

Multiple Choice

$$-\frac{7}{8}+\frac{1}{4}$$  

• $$\frac{5}{8}$$  

• $$-\frac{5}{8}$$  
  

• $$1\frac{1}{8}$$  
  

• $$-1\frac{1}{8}$$