Solve the Addition Equation: Finding the Missing Number in 9+?+3=25

9+?+3=25 9+?+3=25

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Step-by-step video solution

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00:01 We will use the commutative property of addition
00:24 Subtract 12 from both sides in order to isolate the unknown

Step-by-step written solution

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1

Understand the problem

9+?+3=25 9+?+3=25

2

Step-by-step solution

To find out which number is missing, we solve the entire exercise to know which number we will have to add to obtain a result of 25:

9+3=12 9+3=12

To make 12 equal to 25 we will have to add the number 13.

Let's verify:

25−12=13 25-12=13

3

Final Answer

13 13

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\( 8 - 2 + 6 = \)

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