Question

finish decomposing 15. 38 + 15 = ? 15 is decomposed into 2 and a box (to be filled).

Explanation:

Step1: Find missing decomposed value

$15 - 2 = 13$

Step2: Add 38 to decomposed 15

$38 + 2 + 13 = 40 + 13 = 53$

Answer:

The missing decomposed number is 13, and $38 + 15 = 53$