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Decimals | Adding Subtracting Ordering | Crack the Code | Distance Learning

Grade Levels
5th - 7th, Homeschool
Standards
Formats Included
  • PDF
Pages
6 pages
$3.25
$3.25
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Description

Decimals: Adding, Subtracting & Ordering to Thousandths ~ Crack the Code activities are fun and engaging ways for students (grades 5-7) to get computation practice with decimals. They’ll enjoy the challenge and feedback is immediate through solving the puzzles (quotes from The Phantom Tollbooth) correctly.

This Crack the Code resource has two different puzzles, each with three parts.

First, students must successfully solve the problems. The second puzzle has a mix of addition and missing addend problems for an extra challenge.

Next, they must place their answers in order from least to greatest and greatest to least (second puzzle), thus making the alphabet a number line from A to Z .

Finally, students find the corresponding numbers in the code and place that number’s letter in the blank.

This is an excellent challenge for students who breeze through your regular computation practice, as well as a great buddy-problem.

Built-in problem-solving challenges include computation errors, and ordering the decimals incorrectly. If they make a computation error, it can throw off ordering the decimals correctly and cause problems in cracking the code. Or, maybe they get all the computation correct, but they’re off in ordering the decimals. Their challenge will be finding a way to track down their errors, make their corrections and successfully Crack the Code.

Included in this resource are 2 different puzzles with:

♦ Addition with decimals up to thousandths

♦ Missing addends

♦ Understanding decimal place value

♦ Ordering decimals

♦ Teaching Notes and Answer Key

♦ 24 problems, student copies in BW

♦ Aligns with CCSS

Ways to use Crack the Code puzzles~

Centers • Go-to Activities • Fun Class Challenge • Small Group Challenges • Paired Work (Buddy up!) • Test Prep • Homework • Sub Days • RTI

Quotes:

“Never feel badly about making mistakes, as long las you take the trouble to learn from them.” Princess of Pure Reason

Milo: I didn't know I was going to eat my words. King Azaz: Of course you didn't. That's what we're all doing. You should have made a tastier speech.

~Norton Juster, The Phantom Tollbooth

★ This resource is part of the Phantom Tollbooth Bundle.

Click HERE for additional Crack the Code puzzles.

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© 2014 Pamela Kranz All Rights Reserved

Total Pages
6 pages
Answer Key
Included
Teaching Duration
40 minutes
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Standards

to see state-specific standards (only available in the US).
Reason abstractly and quantitatively. Mathematically proficient students make sense of quantities and their relationships in problem situations. They bring two complementary abilities to bear on problems involving quantitative relationships: the ability to decontextualize-to abstract a given situation and represent it symbolically and manipulate the representing symbols as if they have a life of their own, without necessarily attending to their referents-and the ability to contextualize, to pause as needed during the manipulation process in order to probe into the referents for the symbols involved. Quantitative reasoning entails habits of creating a coherent representation of the problem at hand; considering the units involved; attending to the meaning of quantities, not just how to compute them; and knowing and flexibly using different properties of operations and objects.
Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).

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