Respuesta :

Answer:

6

Step-by-step explanation:

Alicia had 15 pack of crayons in her school store. Mrs. Dawson bought 9 for her student. How many pack of crayons is left.  


                                              OR:

   15-9=6

  6+9=15

 20-10=10-4=4

An addition sentence that helps us to solve 15 - 9 is written as;

x + 9 = 15

     An addition sentence is defined as a mathematical expression that shows us the fact of two or more values being added together and their sum.

     Now, in our question we want an addition sentence to help us solve 15 - 9.

We have to find the sum of 2 numbers. Thus, we can write;

x + 9 = 15

Since x = 15 - 9, it means that x + 9 = 15 is the correct additional sentence.

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