Early Finishers 2-Digit Addition

Inside the case file

These I'm done, now what early finisher activities for 2nd grade, 3rd grade and 4th grade cover two digit addition with regrouping, 3 digit addition practice and addition without regrouping in one no-prep Mini Mystery Detective pack of math worksheets.

Students work down a page of column addition, match each answer to a suspect's ID number, and cross suspects off until one villain is left. Use the pack for fast finishers, math centers, morning work or homework. Every case has an answer key.

What's Inside

Eighteen self-checking detective cases, arranged in six levels:

• Two digit addition with no regrouping - 25 + 14, 22 + 21, 61 + 31
• Two digit addition with regrouping - 15 + 17, 37 + 48, 86 + 37
• Three digit plus two digit addition with regrouping - 437 + 58, 675 + 91, 298 + 63
• Three digit addition with no regrouping - 312 + 613, 502 + 451, 121 + 202
• Three digit addition with one regrouping - 263 + 209, 648 + 335, 195 + 724
• Three digit addition regrouping twice - 376 + 159, 198 + 158, 931 + 987
• Lining up ones, tens and hundreds correctly before adding
• Carrying into the tens and into the hundreds place
• A wrong sum matches no suspect, and students can go back and find it
• A level printed on every page, and a contents page listing all eighteen cases
• Full answer keys for every case

Eighteen everyday school cases to crack: the missing library book, the vanished jump ropes, the stolen apples, the missing garden boots, the stolen cupcakes, the stolen umbrellas, the missing scissors, the vanished camera, the stolen life ring, the missing bike helmet, the vanished recycling bin, the stolen coin bank, the missing robot, the stolen soup pot, the stolen telescope, the missing fossil, the vanished trophy, and the missing mower.

What is a Mini Mystery Detective?

A no-prep detective activity where students solve math problems to cross off suspects and unmask the culprit. The math has to be right for the mystery to work out, which makes every page self-checking.

When to Use This Resource

• Early finishers
• Bell ringers
• Sub plans, with the directions on every page
• Independent practice
• Spiral review before a unit test
• Small-group intervention and re-teaching
• Whole-class warm-ups

Grade Levels

Designed for 2nd, 3rd and 4th graders. The six levels run from two digit addition with no carrying all the way up to three digit addition that regroups twice, so one pack covers a mixed-ability classroom. 5th graders who need more practice with the standard algorithm can use it too, along with advanced 1st graders.

Why Teachers Love Mystery Detectives

• Print it and hand it out
• Self-checking
• Every page has an answer key
• A school mystery on every page
• Six levels of the same activity
• Practice with the standard algorithm

Want more cases like these?

Follow Kiwiland Education to discover more Mystery Detective packs, no-prep math activities, and detective-themed stories for the classroom.

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