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McGraw-Hill Math Grade 7 Answer Key Lesson 5.4 Multiplying and Dividing with Negative Numbers
Exercises Multiply or Divide
Question 1.
5 × (-3) = _________
Answer:
5 × (-3) = -15
Explanation:
The above two given numbers have different signs, one is positive and one is negative. So, there product is negative. Multiply 5 with -3 the product is equal to -15.
Question 2.
13 × (-10) = _________
Answer:
13 × (-10) = -130
Explanation:
The above two given numbers have different signs, one is positive and one is negative. So, there product is negative. Multiply 13 with -10 the product is equal to -130.
Question 3.
100 × (-1) = _________
Answer:
100 × (-1) = -100
Explanation:
The above two given numbers have different signs, one is positive and one is negative. So, there product is negative. Multiply 100 with -1 the product is equal to -100.
Question 4.
23 × (-3) = _________
Answer:
23 × (-3) = -69
Explanation:
The above two given numbers have different signs, one is positive and one is negative. So, there product is negative. Multiply 23 with -3 the product is equal to -69.
Question 5.
15 × (-15) = _________
Answer:
15 × (-15) = -225
Explanation:
The above two given numbers have different signs, one is positive and one is negative. So, there product is negative. Multiply 15 with -15 the product is equal to -225.
Question 6.
(-12) × 20 = _________
Answer:
(-12) × 20 = -240
Explanation:
The above two given numbers have different signs, one is negative and one is positive. So, there product is negative. Multiply -12 with 20 the product is equal to -240.
Question 7.
(-2) × (-4) = _________
Answer:
(-2) × (-4) = 8
Explanation:
The above two given numbers have same signs. So, there product is positive. Multiply -2 with -4 the product is equal to 8.
Question 8.
(-1) × 1 = _________
Answer:
(-1) × 1 = -1
Explanation:
The above two given numbers have different signs, one is negative and one is positive. So, there product is negative. Multiply -1 with 1 the product is equal to -1.
Question 9.
(-125) × (-1) = _________
Answer:
(-125) × (-1) = 125
Explanation:
The above two given numbers have same signs. So, there product is positive. Multiply -125 with -1 the product is equal to 125.
Question 10.
(-3) × 103 = _________
Answer:
(-3) × 103 = -309
Explanation:
The above two given numbers have different signs, one is negative and one is positive. So, there product is negative. Multiply -3 with 103 the product is equal to -309.
Question 11.
(-20) ÷ 20 = _________
Answer:
(-20) ÷ 20 = -1
Explanation:
The above two given numbers have different signs, one is negative and one is positive. So, there quotient is negative. Divide -20 by 20 the quotient is equal to -1
Question 12.
(-22) × 0 = _____
Answer:
(-22) × 0 = 0
Explanation:
Multiply -22 with 0 the product is equal to 0. Zero doesn’t have negative sign.
Question 13.
(-3) × (-1) = _____
Answer:
(-3) × (-1) = 3
Explanation:
The above two given numbers have same signs. So, there product is positive. Multiply -3 with -1 the product is equal to 3.
Question 14.
(-12) ÷ 4 = _____
Answer:
(-12) ÷ 4 = -3
Explanation:
The above two given numbers have different signs, one is negative and one is positive. So, there quotient is negative. Divide -12 by 4 the quotient is equal to -3.
Question 15.
15 ÷ (-3) = ____
Answer:
15 ÷ (-3) = -5
Explanation:
The above two given numbers have different signs, one is positive and one is negative. So, there quotient is negative. Divide 15 by -3 the quotient is equal to -5.
Question 16.
(-27) ÷ (-9 ÷ \(\frac{1}{9}\)) = ____
Answer:
(-27) ÷ (-9 ÷ \(\frac{1}{9}\)) = \(\frac{1}{3}\)
Explanation:
The above two given numbers have same signs. So, there quotient is positive. Divide (-27) by (-9 ÷ \(\frac{1}{9}\)) the quotient is equal to \(\frac{1}{3}\).