3-Digit Subtraction With Regrouping Worksheets - ExperTuition - Free Printable

Problem Analysis:

The image shows two versions of a math worksheet focused on 3-digit subtraction with regrouping. The key difference between the two versions is that one version includes a standard reference (3.NBT.A.2), while the other does not. The task appears to be about solving the subtraction problems and understanding the purpose of listing standards.

#### Key Points:
1. Worksheet Content: Both worksheets contain identical subtraction problems.
2. Standard Reference: One worksheet explicitly lists the standard 3.NBT.A.2, which stands for a specific Common Core State Standard in mathematics.
3. Objective: The task likely involves solving the subtraction problems and explaining the significance of listing standards.

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Solution:

#### Step 1: Solve the Subtraction Problems
We will solve the subtraction problems from either worksheet (since they are identical). Here are the problems and their solutions:

1. \( 605 - 164 = 441 \)
2. \( 324 - 152 = 172 \)
3. \( 845 - 395 = 450 \)
4. \( 438 - 245 = 193 \)
5. \( 754 - 491 = 263 \)
6. \( 549 - 175 = 374 \)
7. \( 953 - 171 = 782 \)
8. \( 628 - 372 = 256 \)
9. \( 454 - 163 = 291 \)
10. \( 515 - 233 = 282 \)
11. \( 826 - 265 = 561 \)
12. \( 738 - 364 = 374 \)

#### Step 2: Explain the Significance of Listing Standards
The standard 3.NBT.A.2 is listed on one of the worksheets. This standard refers to the Common Core State Standards for Mathematics, specifically for Grade 3, Number & Operations in Base Ten (NBT), and it focuses on fluently adding and subtracting within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

- Purpose of Listing Standards:
- Alignment: Listing standards ensures that the worksheet aligns with educational benchmarks and learning objectives.
- Teacher Guidance: It helps teachers understand the specific skills being practiced and how they fit into the broader curriculum.
- Parental Awareness: Parents can see what skills their children are expected to learn and practice.
- Assessment: Standards provide a clear framework for assessing student progress and ensuring comprehensive coverage of required skills.

#### Step 3: Compare the Two Versions
- Standard Not Listed: The worksheet without the standard is more straightforward but lacks context about the educational goals.
- Standard Listed: The worksheet with the standard provides additional clarity and alignment with educational standards, making it easier for educators and parents to understand the purpose of the exercises.

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Final Answer:

The subtraction problems are solved as follows:
1. \( 441 \)
2. \( 172 \)
3. \( 450 \)
4. \( 193 \)
5. \( 263 \)
6. \( 374 \)
7. \( 782 \)
8. \( 256 \)
9. \( 291 \)
10. \( 282 \)
11. \( 561 \)
12. \( 374 \)

The significance of listing standards (e.g., 3.NBT.A.2) is to ensure alignment with educational benchmarks, guide teaching and assessment, and provide transparency for both educators and parents.

\[
\boxed{441, 172, 450, 193, 263, 374, 782, 256, 291, 282, 561, 374}
\]