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# 4th Grade Numbers and Base Ten/Whole Number QR Codes

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384 KB|32 pages
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My students thoroughly enjoy working with QR codes and demonstrating their knowledge in response to these questions.

This set of over 210 QR Codes addresses the following Common Core standards:

4.OA.4 Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite.
4.NBT.1 Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right. For example, recognize that 700 ÷ 70 = 10 by applying concepts of place value and division.
4.NBT.2 Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two multidigit numbers based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
4.NBT.3 Use place value understanding to round multi-digit whole numbers to any place. Use place value understanding and properties of operations to perform multi-digit arithmetic.
4.NBT.4 Fluently add and subtract multi-digit whole numbers using the standard algorithm.
4.NBT.5 Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
4.NBT.6 Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

Use the Student Instructions Page as a task card for a small group or center. Note that these instructions call for students to use pictures, numbers, or words to demonstrate the process for finding their answers. This method for supporting answers builds off lower grades understanding of problem explanations and is important with decimals because of the relationship to fractions and visual models. This explanation method corresponds with the Common Core Mathematical Practices:
4. Model with mathematics.
5. Use appropriate tools strategically.
6. Attend to precision.

As a teacher you may choose to supplement this set QR Codes with decimal squares, base ten blocks, fraction tiles, and/or calculators.

Included in this document is a table of contents for the QR Codes by topic as well as alignment to Common Core Standards. Please note that QR codes do not have to be printed in color in order to work. In other words, color codes can be printed black and white and should still work without issues. Thank you.
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