Adding and Subtracting Jeopardy

Rules

100

When adding two of the same sign, you should...

keep that sign!

200

When working with different signs,

subtract!

300

What determines positive or negative when there are different signs?

Which number has the larger absolute value

Integers

100

(-5) + (-2)

-7

200

(-30) + 12

-18

300

48 - (-56)

104

Decimals

100

(-2.7) - 3.88

-6.58

200

54 - 99.33

-45.33

300

-841.22 + 9.377

-831.843

Fractions

100

(-1/6) + 8/6

1 1/6 (1 and 1/6)

200

2 2/4 - 5 (2 and 2/4 minus 5)

- 2 1/2 (negative two and one half)

300

4 1/3 - 2 7/10

1 19/30

Describe the Error

100

-5 + -5 is 0 because the -5's subtract and cancel each other out.

ADD because of same signs. Answer is -10.

200

The mixed number 4 2/5 (4 and 2/5) becomes 13/5. 4 times 2 is 8, plus the 5 from the denominator to make 13/5.

Multiply the denominator and whole number first, not the numerator and whole number.

300

If I take one hundred positive numbers and one negative number and add them together, the final sum will be a positive number because there were more positive numbers than negative numbers.

That's not necessarily true. How "big" was the negative number? (Imagine the number 1 100 times versus -1,000,000)