Examples with solutions for Multiplication and Division of Signed Mumbers: Multiplication of negative numbers

Exercise #1

Complete the following exercise:

(7)(3)= (-7)\cdot(-3)=

Video Solution

Step-by-Step Solution

Let's recall the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

7×3=+21 -7\times-3=+21

Answer

21 21

Exercise #2

Complete the following exercise:

(3)(6)= (-3)\cdot(-6)=

Video Solution

Step-by-Step Solution

Let's remember the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

3×6=+18 -3\times-6=+18

Answer

18 18

Exercise #3

Complete the following exercise:

(1)(1)= (-1)\cdot(-1)=

Video Solution

Step-by-Step Solution

Let's recall the law:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

1×1=+1 -1\times-1=+1

Answer

1 1

Exercise #4

Complete the following exercise:

(3)(10)= (-3)\cdot(-10)=

Video Solution

Step-by-Step Solution

Let's remember the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

3×10=+30 -3\times-10=+30

Answer

30 30

Exercise #5

Complete the following exercise:

(4)(8)= (-4)\cdot(-8)=

Video Solution

Step-by-Step Solution

Let's remember the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

4×8=+32 -4\times-8=+32

Answer

32 32

Exercise #6

Choose the correct answer to the following exercise:

(6)(6)= (-6)\cdot(-6)=

Video Solution

Step-by-Step Solution

Let's recall the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

6×6=+36 -6\times-6=+36

Answer

36 36

Exercise #7

Complete the following exercise:

(2)(5)= (-2)\cdot(-5)=

Video Solution

Step-by-Step Solution

Let's remember the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

2×5=+10 -2\times-5=+10

Answer

10 10

Exercise #8

What is the answer to the exercise below?

(2)(4)= (-2)\cdot(-4)=

Video Solution

Step-by-Step Solution

Let's remember the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

2×4=+8 -2\times-4=+8

Answer

8 8

Exercise #9

What is the answer to the following exercise?

(3)(5)= (-3)\cdot(-5)=

Video Solution

Step-by-Step Solution

Let's remember the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

3×5=+15 -3\times-5=+15

Answer

15 15

Exercise #10

Complete the following exercise:

(12)(2)= (-\frac{1}{2})\cdot(-2)=

Video Solution

Step-by-Step Solution

Let's recall the rule:

(x)×(x)=+x (-x)\times(-x)=+x

Therefore, the sign of the exercise result will be positive:

12×2=+1 -\frac{1}{2}\times-2=+1

Answer

1 1