Solve the Multiplication Equation: (-3) × ? = -9

Fill in the missing number:

(−3)⋅?=−9 (-3)\cdot?=-9

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find the unknown
00:04 Negative times positive always equals negative
00:08 Therefore the unknown is positive
00:14 Now let's find the unknown
00:20 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:

(−3)⋅?=−9 (-3)\cdot?=-9

2

Step-by-step solution

Remember the following law:

(−x)×(+x)=−x (-x)\times(+x)=-x

Let's think about which number we need to multiply by 3 to get 9:

3×3=9 3\times3=9

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

−3×(+3)=−9 -3\times(+3)=-9

3

Final Answer

3 3

Practice Quiz

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Solve the following exercise:

\( (+5)\cdot(+5)= \)

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