Add 2-digit numbers by making tens

**Complete to solve $5+ 75$.** $\phantom{=} 5+75$ $=5+($[[☃ input-number 1]] $+ 70)$ $=(5 + $[[☃ input-number 2]]$)+ 70$ $=$ [[☃ input-number 3]] $+70$ $=$ [[☃ input-number 4]]