This challenging worksheet pushes kindergartners into harder territory with multiple-choice questions and missing-addend puzzles. Children pick the correct sum for tougher facts like 8 + 9, 6 + 7, 7 + 8, and 9 + 6, where every option looks tempting and careful counting matters. The numbers cluster near 15, exactly where many kindergartners stumble.

Then the worksheet flips the problem around with missing-addend equations like ___ + 5 = 14, 8 + ___ = 17, and ___ + 7 = 13, asking children to figure out the hidden number. This sheet builds the flexible thinking kindergartners need before subtraction and first-grade math.