Pre Algebra - Lesson 4: Multiplying and Dividing Negative Numbers

Exercises


Question 1
Work out the answers to the following multiplications without using a calculator:

(a) (-7) × 2 = __
(b) (-4) × 8 = __
(c) (-2) × (-5) = __
(d) (-6) × (-3) = __
(e) (-3) × 7 = __
(f) (-10) × (-4) = __
(g) 8 × 4 = __
(h) 3 × (-6) = __
(i) (-7) × (-2) = __
(j) (-4) × (-5) = __
(k) (-7) × 0 = __
(l) 8 × (-5) = __

Question 2
Work out the answers to the following divisions without using a calculator:

(a) (-10) ÷ (-2) = __
(b) (-15) ÷ 5 = __
(c) 18 ÷ (-3) = __
(d) 14 ÷ (-7) = __
(e) (-21) ÷ (-3) = __
(f) (-45) ÷ 9 = __
(g) 50 ÷ (-5) = __
(h) (-100) ÷ (-4) = __
(i) 80 ÷ (-2) = __
(j) 26 ÷ (-13) = __
(k) (-70) ÷ (-7) = __
(l) (-42) ÷ 7 = __

Question 3
Complete these multiplication tables:

(a)

× __ -1 __ 2 __ __ __ __ -2 2 __ -3 __ __ -9

(b)

× -2 __ __ __ 10 __ __ -2 __ 6 __ 3 __ __ -12

Question 4
Fill in the missing numbers in these calculations:

(a) __ × 5 = -20
(b) (-80) ÷ __ = 4
(c) 16 × __ = -32
(d) (-4) × __ = 32
(e) __ × (-3) = 12
(f) 40 ÷ __ = -8
(g) -8 × __ = 48
(h) -32 ÷ __ = 4
(i) 15 × __ = -60
(j) 100 ÷ __ = -25