Addition Subtraction Comparing Two-Digit Numbers - Math Riddle Cards

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Grade Levels
1st - 2nd, Homeschool
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Formats Included
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12 student pages
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Your students will beg for more math time when you introduce them to math riddle task cards! Here’s a set of 24 cards that will build skills in adding, subtracting, and comparing two-digit numbers, with and without regrouping.

How do math riddle task cards work?

On each card, your students will be presented with a grid of four numbers. They'll solve math clues to eliminate three of the numbers. The number that's left is Puppy's Missing Bone, the solution to the riddle!

What does this resource include?

24 math riddle task cards

Student recording page and answer key

A card game using addition and subtraction to compare numbers is also included for additional practice, for independent use in a math center.

Here are some options for using these task cards:

♦ Use in a math center or math rotation for individual or partner work

♦ Add the riddles and card game to your early finishers collection

♦ Use the riddle card for whole class review with your document camera

♦ Use as a skills review rotation, like Scoot, individually or with partners, with

students moving to stations around the classroom to solve the riddles

♦ Use for morning “bell ringers

♦ Start a small group lesson by solving a riddle card together. It's an instant number talk!

Paraprofessionals and parent helpers love to use these cards, since they can use as few or as many as time allows, still giving students a sense of completion


Linda Nelson grants permission to the original downloader to reproduce material for his or her own classroom use only. No other part of this work may be reproduced in whole or in part by electronic or mechanical means including information storage and retrieval systems without permission in writing from the author.


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Primary Inspiration by Linda Nelson

Total Pages
12 student pages
Answer Key
Teaching Duration
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to see state-specific standards (only available in the US).
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, 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. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), 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.


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