This hard worksheet pushes first grade place value into missing-digit and alternative-representation problems. Part A offers four multiple-choice questions about digit values, matching tens, and recognizing 56 in tens-and-ones form. Part B has five fill-in-the-blank problems where students solve for missing parts, like '___ tens and 5 ones equals 75' and '60 + ___ equals 68,' preparing first graders for two-digit addition coming next.