2-digit addition with regrouping comes to life as a Presidents Day detective case — students solve column-addition problems, match each answer to a clue, and eliminate suspects until they crack the mystery. This no-prep, printable, self-checking Math Mystery bundle keeps 1st, 2nd, and 3rd graders engaged through a themed math day and works perfectly for math centers, morning work, homework, early finishers, substitute/relief days, indoor recess, spiral review, and test prep. Just print and go — students solve, match the answer to a clue, cross off suspects, and reveal the answer.
Quick Details
Skill: 2-digit addition with regrouping (carrying) · Grades: 1st–3rd · Format: 5 mysteries + full answer keys + congratulations page (printable PDF) · Theme: Presidents Day
The 5 Mysteries
President Lincoln's Hat — President Lincoln is getting ready and can't find his hat. Students must work out where he left it.
The Missing Speech — The school principal's Presidents Day speech has vanished. Students track down where it went and who took it.
President Costume — The teacher has dressed up as one of the presidents. Students figure out which president it is.
Class President — The class has voted for a new class president. Students work out who won the vote.
Missing Balloons — A bunch of balloons has gone missing. Students find out who took them, when, how many, and what colour.
Why Teachers Love It
Zero prep — print and teach. The built-in answer keys make every mystery self-checking, so students get instant feedback and stay motivated. The detective hook pulls in reluctant and struggling learners, and the five separate mysteries make it easy to differentiate or stretch the activity across a whole Presidents Day week.
Skills Covered
2-digit addition with regrouping (carrying), fluency with two-digit sums, plus logical reasoning and deductive elimination as students rule suspects out clue by clue.
What's Included
5 printable mystery worksheets, full answer keys for every mystery, student instructions, and a Presidents Day congratulations page — all in one PDF.
Best Used For
Presidents Day math centers, morning work, homework, early finishers, substitute/relief days, indoor recess, spiral review, and test-prep practice for 1st, 2nd, and 3rd grade 2-digit addition with regrouping.
