Integer Operations- Are they correct and why?

-14 - 20 = -6

• Yes because when you subtract 20 from 14 you are left with 6.

• Yes because the -20 is larger so the answer is -6.

• No because the answer should be positive because of the 2 negative numbers.

• No because when you keep change change then -14 + (-20) = -34.

-5 X -3 = -15

• Yes because 5 times 3 is 15.

• No because when you multiply a negative by a negative your answer is positive.

• No because the answer is 8.

-5 ¹/₂ + (-2 ³/₄) = -8 ¹/₄

• Yes because same signs then you add the numbers together.

• No because you need to keep change flip the second fraction.

• Yes because the common denominator is 4.

• No because you do not have common denominators.

4.2 - 8.36 = -12.56

• No because they are different signs so you have to subtract.

• No because when you line up the 2 and the 6 the answer is -7.94

• Yes because when you have different signs the answer is negative.

• Yes because keep change change means you change the -8.36 to a positive 8.36.

Which is better for you candy or fruit?

• Fruit

• Candy

-4.5 X 7 = 31.5

• Yes because 4.5 times 7 is 31.5.

• Yes because a negative times a positive equals a negative answer.

• No because -45 X 7 equals -315.

• No because a negative times a positive equals a negative answer.

-3.2 X .24 has 3 decimal places.

• No they only have 1 because -3.2 only has one and it is the first number.

• No because when you line up the decimals on top of each other you have to write in a 0 for place value then there are 2 decimal places in each number.

• Yes because when you count there are 3 total with both numbers.

• Yes because there is a 3 in -3.2

The I-5 I means the answer will be -5.

• Yes because the bars mean to multiply.

• Yes because the bars mean to stay the same.

• No because the bars mean the answer should always be positive.

• No because the bars mean nothing.

Who is your math teacher?

• Dean

• Stewart

• Odom

• Armstrong

-13 > -19

• No because 19 is larger than 13.

• No because the arrow points to the larger number.

• Yes because -13 is closer to 0 than -19 is.

• Yes because the arrow points to the larger number.