Mini-Math Mystery Activity 1st Grade - Addition within 20 Facts & Word Problems

Rated 4.83 out of 5, based on 116 reviews

4.8 (116 ratings)

36,765 Downloads

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Mrs J's Resource Creations

31.2k Followers

Grade Levels

K - 2nd

Subjects

Math, Basic Operations, Word Problems

Resource Type

Worksheets, Activities, Centers

Standards

CCSS1.OA.A.1

CCSS1.OA.A.2

CCSS1.OA.C.6

Formats Included

FREE

Wish List

FREE

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Mrs J's Resource Creations

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Description

This Mini-Math Mystery is a fun 'game-like' one-page activity to practice addition skills 1-20. Ideal for 1st Grade or any class working with adding numbers 1-20 Facts and Word Problems.

Multiple Uses:

Math Center Task
Consolidation task
Practice and Review Task
Early-Finisher Task
Homework

Prep:

Print the single worksheet page, make as many copies as you need for your kids, and the activity is ready to go!

Optional:

Printable awards are provided to give to your Detectives after solving the mystery.

Interested in more Mini Math Mysteries for 1st Grade?

There are TEN Mini Math Mysteries in each pack:

These Mini-Math Mysteries are different from my original Math Mystery Packets. They are designed as a condensed activity for a quick one-page practice of math skills. The elimination process is only based on answer matching with the images in this series. If you would like to try the other type of original Math Mysteries to see what’s included in those packets and the difference in design, please visit this FREE Multi-Grade Math Mystery Packet, The Case of the Super Bad Superhero.

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Add extra motivation with this Detective Rank Chart Download the Mystery Record & Rank Chart FREEBIE HERE

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Thanks for your support! :)

Jacqui J.

Mrs J's Resource Creations

Total Pages

Answer Key

Included

Teaching Duration

N/A

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Standards

to see state-specific standards (only available in the US).

CCSS1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

CCSS1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

CCSS1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

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Mrs J's Resource Creations

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