Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}

Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
Unlock the Box! Christmas Math Activity {Addition & Subtraction w/ Regrouping}
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  1. Unlock the Box! Bundle is a set of 8 engaging math challenges, each with a focus on addition and subtraction with regrouping. In each activity, a clever character has locked a prize inside of a box, and students must solve the clues and find the key to unlock the box! **You are viewing the Grade 3-
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Unlock the Box! is an engaging math challenge for Christmas, with an addition and subtraction with regrouping focus. An elf named Ingrid has locked a prize inside of a box, and students must solve her clues and find the key to unlock the box!

**You are viewing the Grade 3-5 Edition. To see the Grade 2-3 Edition, click HERE.**

In the first series of clues, students solve engaging story problems about Ingrid the Elf focusing on addition and subtraction with regrouping, which will help them decode a password. The password is then given to the teacher in order to receive the final page of clues, in which students must decipher a math puzzle that reveals the location of the key. Once students find the key, they’ll unlock the box and share Ingrid’s prize with the entire class!

I provide you with:

  • the note from Ingrid the Elf to set the scene
  • ideas for prizes including a collectible ribbon/bookmark (collect them all!) and a sheet of homework passes
  • paper lock, key, and straps to secure the box containing the prize (Don't worry about it being made of paper: Ingrid warns that the prize will self-destruct if anyone tries to tamper with the lock without the correct key. However, you could also use a real lock and key with a box secured with a chain.)
  • Clues with addition/subtraction story problems (about Ingrid) and clever puzzles that students must solve in order to ultimately find the location of the hidden key (*Three difficulty levels of all clues are given. See below for details.)
  • Full answer keys
  • Step-by-step, detailed instructions on how to set up the materials, including: preparing the prize box, hiding the key (two specific options provided), setting out the clues, and leading the activity.

All you provide is a box that closes (like a shoe box or storage bin).

The math focus in this activity is addition and subtraction with regrouping. Three versions of the clues are provided, each at a different level of difficulty. The challenge is intended to be done in partnerships and without calculators, to practice these math skills.

  • Version A (grade 3) is the least challenging: all addition and subtraction to be done is “within 1,000” (all numbers/answers are three-digits or less); regrouping is needed often.
  • Version B (grade 3/4) is more challenging: most addition and subtraction to be done uses 3 and 4 digit numbers (a few instances of 5 digit numbers); regrouping is needed often.
  • Version C (grades 4/5) is the most challenging: most addition and subtraction to be done uses 4 and 5 digit numbers (a few instances of 6 digit numbers); multiple instances of regrouping within the same problem.

**NOTE: This resource is NOT editable.**

Check out the full line of my Unlock the Box! activities:

**For personal and single classroom use only. If using with multiple classrooms, please purchase additional licenses at the discounted rate.**

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Visit me at my blog: The Thinker Builder, or on Instagram, Facebook, or Pinterest!

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You might also be interested in my Christmas Writing Activities.

Total Pages
20+
Answer Key
Included
Teaching Duration
1 hour
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$4.00
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