9 + 4 = ?\n10 + 5 = ?\n10 + 4 = ?\n9 + 5 = ?

Explanation:

Step1: Calculate 9 + 4

$9+4 = 13$

Step2: Calculate 10 + 4

$10+4 = 14$

Step3: Calculate 10 + 5

$10+5 = 15$

Step4: Calculate 9 + 5

$9+5 = 14$

Answer:

$9 + 4=13$ $10 + 4 = 14$ $10 + 5 = 15$ $9 + 5 = 14$