Operations on Rational Numbers

What rule do we use when ADDING rational numbers? SELECT ALL THAT APPLY :)

• Same sign, add & keep. Different signs, subtract
• Keep, add, opposite.
• Do the reciprocal
• Same sign = positive

• 11/3
• 8/3
• -11/3
• -8/3

• 2  3/4
• 11/4
• 4  2/3
• -2  3/4

• 1
• -1
• 12/12
• 8/7

Find the product of...
-7.8 and -.32

• 2.496
• 4.14
• 8.12
• -2.496

What is the sum of -9.5 and 4.68

• 4.82
• -4.82
• 14.18
• 482

What is the rule for subtracting rational numbers?

• Turn it into adding the opposite of what follows the subtraction.
• Subtract the absolute values
• Same Signs = Negative
• Different Signs = Negative

If a fraction answer is improper, we need to....

• Subtract
• Multiply then add.
• Add
• Divide & Simplify.

-9 x 3

• -12
• -27
• -6
• 27

-12[-48 - (-48)] - (-4)² 

• 0
• -12 
• -16 
• 16