Solve the Multiplication Equation: Finding the Factor in 2 × ? = -8

Question

Fill in the missing number:

$2\cdot?=-8$

00:00 Find the unknown

00:05 Positive times negative always equals negative

00:09 Therefore the unknown is negative

00:12 Now let's find the unknown

00:18 This is the unknown, now let's add its sign

00:22 And this is the solution to the question

Remember the following law:

$(-x)\times(+x)=-x$

Let's think about which number we need to multiply by 2 to get 8:

$2\times4=8$

Now let's put the numbers together with the appropriate sign as written in the law above as follows:

$+2\times(-4)=-8$

$-4$