Adding & Subtracting Rational Numbers

Adding Fractions

100

-5 1/3 + 8 2/3

What is  10/3 (3 1/3)

200

4 5/6 + (-1 2/3)

What is  19/6 (3 1/6)

300

-18 7/9 + 7 4/9

What is – 34/3  (–11 1/3)

400

3 1/4 + 7 3/4

What is 11/1 (11)

500

-12 7/8 + -2 1/2

What is – 123/8 (– 15 3/8)

Subtracting Fractions

100

-8 1/2 - 4

What is – 25/2 (– 12 1/2)

200

7 3/8 - (-2 1/8)

What is 19/2 (9 1/2)

300

-26 2/5 - ( -11 1/5)

What is – 76/5 ( –15 1/5 )

400

14 1/7 - ( -3 3/14)

What is 243/14 (17 5/14 )

500

-5 3/6 - ( -10 2/3)

What is  31/6 ( 5 1/6 )

Rational Numbers? Where needed, give a numerical answer.

100

– 4.8 is a rational number

What is YES.  – 48/10 (– 24/5 in simplest form)

200

2.08 is a rational number

What is YES. 208/100 (52/25 simplest form)

300

12/0 a rational number

What is NO. Denominator CAN NOT be zero

400

– 4 2/5 is a rational number

What is YES. – 22/5

500

2.5/10 is a rational number

What is NO. (numerator needs to be INTEGER)

Math Rules

100

Part 1 - what is the sign of the sum of 2 negative numbers? Part 2 - what is the sign of the sum of 2 positive numbers?

What is Part 1 - negative Part 2 - positive

200

Double Jeopardy!!!! How can you know what sign will be for the sum of a negative and a positive number?

The answer will have the same sign as the number with the greatest absolute value.

300

Give one of the 2 phrases or names we use in math to remind us how to change a subtraction sentence into an addition sentence.

What is same sides add and keep, different signs subtract

400

What has to be done before you can add or subtract fractions?

What is have a common denominator

500

 Can you divide fractions

What is NO. KFC (keep the first fraction, flip the second fraction and change divide to multiply)