Lesson 11 Quiz Review

Without solving, decide which expression has a positive value.

• (-3)(19)(-4)(-6)

• (-5)(4)(-8)

• (-2)(-3)(-2)

• (-6)(-18)(-15)(12)

Without solving, decide which expression has a positive value.

• (6)(-19)(-4)(-6)

• (-5)(-4)(-8)

• (-2)(-2)(-2)

• (-6)(18)(-15)(12)

Devon says that 4(-3) = 12. Which statement explains why Devon is correct or incorrect.

• He is correct, because four groups of three is twelve.

• He is correct, because the sign of the product is the same sign as the 1st factor.

• He is correct, because the product of a negative integer and a positive integer is positive.

• He is incorrect, because the product of a negative integer and a positive interger is negative.

Juanita says that -5(4) = -20. Which statement explains why Juanita is correct or incorrect.

• She is correct, because five groups of four is twenty.

• She is correct, because the sign of the product is the same sign as the 1st factor.

• She is correct, because the product of a negative integer and a positive integer is negative.

• She is incorrect, because the product of a negative integer and a positive interger is positive.

Which of the following multiplication equations are correct? Select all that show the correct product.

• (6)(-3) = 18

• (5)(3) = 15

• (2)(-3)(-3) = 18

• (-2)(-1)(-4) = 8

Which of the following multiplication equations are correct? Select all that show the correct product.

• (-7)(-3) = 21

• (4)(-2)(-6) = -48

• (-5)(-2)(-3) = 30

• (1)(-3)(-2) = 6

Bryce says that (3)(-6)(-1) is equal to (3)(6). Melody say (3)(-6)(-1) is equal to (-18)(-1). Who is correct?

Which one BEST describes this situation?

• Bryce is incorrect because the product of a negative and a positive is a negative.

• Melody is incorrect because the product of a negative and a negative is positive.

• Both are correct because the product of two negatives is positive and both rewrote their expressions so that they will get a product of 18.

• Neither are correct because the product of a negative and a positive is negative.

Alexa says that (5)(-3)(1) is equal to (5)(-3). Brian say (5)(-3)(1) is equal to (-15)(1). Who is correct?

Which one BEST describes this situation?

• Alexa is incorrect because the product of a negative and a positive is a positive.

• Brian is incorrect because the product of a negative and a negative is positive.

• Both are correct because the product of a positive and a negative is negative and both rewrote their expressions so that they will get a product of -15.

• Neither are correct because the product of a negative and a positive is negative.

Megan is solving a number puzzle that involves three integers, a, b, and c, where a is a negative integer. The product of a and b is 6. The product of a and c is -4. The product of b and c is -6. What are the values of a, b, and c?

Which one of the following is correct?

• a = 2, b = 3, c = -2

• a = -2, b = -3, c = 2

• a = -2, b = 3, c = -2

• a = -2, b = -3, c = -2

Fazil is solving a number puzzle that involves three integers, x, y, and z, where x is a positive integer. The product of x and y is -18. The product of x and z is -12. The product of y and z is 6. What are the values of x, y, and z?

Which one of the following is correct?

• x = 6, y = -3, y = -2

• x = -6, y = 3, z = 2

• x = 3, y = -2, z = -6

• x = 2, y =- 6, z = 3