Add 2-digit numbers by making tens 2

**Complete to solve $5 + 68$.** $\phantom{=}5+68$ $=(3+$ [[☃ input-number 1]]$)+ 68$ $=3 + ($[[☃ input-number 2]] $+68)$ $=3 + $ [[☃ input-number 3]]$$ $=$ [[☃ input-number 4]]