Solve the Equation: (-12) + ? = 30 | Finding the Missing Addend

(−12)+(?)=30 (-12)+(?)=30

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Complete the missing
00:03 Let's start from point (-12) on the negative (left) side of the axis
00:10 This is the desired number, let's find it on the axis
00:14 Let's find its distance from point (-12)
00:19 The direction of progression is to the right (positive)
00:44 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

(−12)+(?)=30 (-12)+(?)=30

2

Step-by-step solution

Let's count on the number line the steps between -12 and 30.

We can see that 42 steps are required:

000555101010151515202020252525303030-12-10-8-6-4-226481012172227323742

3

Final Answer

42 42

Practice Quiz

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a is negative number.

b is negative number.

What is the sum of a+b?

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