Solve the Multiplication Equation: 10 × ? = -100

Fill in the missing number:

10⋅?=−100 10\cdot?=-100

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find the unknown
00:03 Positive times negative always equals negative
00:07 Therefore the unknown is negative
00:12 Now let's find the unknown
00:20 This is the unknown, now let's add its sign
00:23 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Fill in the missing number:

10⋅?=−100 10\cdot?=-100

2

Step-by-step solution

Let's remember the law:

(−x)×(+x)=−x (-x)\times(+x)=-x

Let's think about which number we need to multiply by 10 to get 100:

10×10=100 10\times10=100

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

+10×(−10)=−100 +10\times(-10)=-100

3

Final Answer

−10 -10

Practice Quiz

Test your knowledge with interactive questions

What will be the sign of the result of the next exercise?

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

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