How many carries do I need to add these two numbers? Task

Given two positive integers, output the number of carries needed to add them together in long addition in base 10.

Examples

¹¹¹   &lt;-- carries
 999
+  1
----
1000


Three carries are needed.

 ¹
 348
+ 91
----
 439


One carry is needed.

Testcases

999,   1 -&gt; 3
398,  91 -&gt; 1
348,  51 -&gt; 0
348,  52 -&gt; 2
  5,  15 -&gt; 1
999, 999 -&gt; 3
505, 505 -&gt; 2


Scoring

This is code-golf. Shortest answer in bytes wins. Standard loopholes apply.
Mathematica, 46 39 bytes
x=Tr@*IntegerDigits;(x@#+x@#2-x@+##)/9&amp;

input

[348,51]

-7 bytes from JungHwan