Pot Luck
Fraction/Decimal
Adding Rational Numbers
Subtracting Rational Numbers
Multiplying Rational Numbers
Dividing Rational Numbers
100

-5/6 x -5/7 x -5/8 x -5/9

What is the sign of the answer?

What is positive?

there are 4 negative sign, which is even

100

3.15 + 2.25

What is 5.40?

same sign, combine, keep sign

100

8/11 - 3/11

What is 5/11 ?

keep change change

different sign, subtract with one farthest from zero on top, keep sign of top number

100

5 x (1/3)

What is 1 and 2/3 or 5/3 ?

100

1/4 divided by 3/8

What is 2/3?

keep change flip

simplify 4 and 8 before you multiply to 1 and 2

200

-5/6 - (-5/9)

What is the sign of the answer?

What is negative?

if numerators are the same, then one with largest denominator is closer to zero  

keep sign of number farthest from zero

200

0.38 + (-1.2)

What is -0.82?

different sign, subtract with one farthest from zero on top, keep sign of top number.

200

- 4/13 - 8/13

What is -12/13 ?

keep change change

same sign, combine, keep sign

200

-3.2 x 5

What is -16?

multiply 32 x 5 then move decimal to left 1 place

one negative sign gives negative answer

200

-20 divided by 0.5

What is -40?

one negative gives a negative answer

change 0.5 to 5 and 20 to 200

-200 divided by 5

300

0.07 x -0.07

What is -0.0049?

do 7 x 7 and then move decimal 4 places to left

300

9/25 + (-17/25)

What is -8/25?

different sign, subtract with one farthest from zero on top, keep sign of top number.

300

-0.06 - (-0.86)

What is 0.8 ?

keep change change

different sign, subtract with one farthest from zero on top, keep sign of top number

300

-1/6 x (-2/3)

What is 1/9?

two negatives give a positive answer

2/18 simplifies to answer above

300

-15 divided by -5/8

What is 24?

answer is positive because there are two negatives

-15 is same as -15/1

keep change flip

simplify 15 and 5 to 3 and 1 before multiplying

400

-1/4 x -1/2

What is 1/8?

there are two negative signs, which is even, so answer is positive

400

-5/12 + 1/5

What is -13/60?

least common denominator is 60

different sign, subtract with one farthest from zero on top, keep sign of top number

400

-10/24 - (-3/4)

What is 1/3 ?

keep change change

common denominator is 24

different sign, subtract with one farthest from zero on top, keep sign of top number

400

Evaluate 2/3 * -6

What is -4 ?

one negative gives a negative answer

-6 is same as -6/1

-12/3 simplifies to -4

400

2 and 1/2 divided 4

What is 5/8?

change mixed number to improper fraction 5/2

4 is same as 4/1

keep change flip 

500

2 and 1/3 divided by -3 and 1/2

What is -2/3?

change mixed numbers to improper fractions.

there is 1 negative sign so answer is negative

500

5/8 + -2/3

What is -1/24?

least common denominator is 24. 

different sign, subtract with one farthest from zero on top, keep sign of top number

500

91.5 - 76 

What is 15.5?

keep change change

different sign, subtract with one farthest from zero on top, keep sign of top number

500

6 and 2/3 times 27 

What is 180?

27 is same as 27/1

change mixed number to improper fraction

6 and 2/3 is 20/3

simplify 3 and 27 before you multiply to 1 and 9

500

8804.46 divided by 209.63 

What is 42?