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Show regrouping marks clearly.  \nPart A – Warm-Up  \n1.) 2.) 3.)  \n274 385  \n+ 308 + 555  \nPart B – Core Practice  \n4.)  \n309  \n+ 796  \n5.) 6.)  \n385 + 967  \n1,267 + 775  \n7.) 8.) 9.)  \n2 ,506  + 3 ,729  \n5 ,408  + 2,788  \n3 ,747  + 6 ,003  \n10.) 11.) 12.)  \n4 ,207  + 2 ,586  \n6,127  + 2,876  \n2 ,573  + 1 ,688  \n13.) 14.) 15.)  \n3,846  + 4 ,065  \n6 ,809  + 3 ,772  \n5,304  + 3,868  \n1  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)  \nPart C – Challenge Problems  \n16.) 17.) 18.)  \n5 ,910  + 7 ,798  \n5 ,988  + 4 ,999  \n7 ,806  + 8 ,698  \n19.) Trent has 2 ,897 baseball cards and 5,124 football cards in his collection.  \nHow many cards does he have in all?  \nShow your work:  \nMy Answer:    \n20.) Error Analysis:  \nMarcus solved the addition problem below.  \n4,582 + 2,769  \n7,241  \nIs his answer correct? Circle one: YES NO If no, write the correct sum:    \nIf his answer was incorrect, explain in one sentence what he did wrong:  \n2  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)  \nAnswer Key  \nPart A – Warm-Up  \n1. 582  \n2. 940  \n3. 944  \nPart B – Core Practice  \n4) 1,105 5) 1,352 6) 2,042 7) 6,235 8) 8,196  \n9) 9,750  \n10) 6,793 11) 9,003 12) 4,261 13) 7,911 14) 10,581  \n15) 9,172  \nPart C – Challenge Problems  \n16) 13,708 17) 10,987 18) 16,504  \n19) 8,021 total cards  \n20) Error Analysis  \n• Circle: NO  \n• Correct sum: 7,351  \n• One-sentence explanation: He regrouped incorrectly (he didn’t carry properly to the next place value) .  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)  \n3","cbCaifuWmZHHIGyY","https://ap.wps.com/l/cbCaifuWmZHHIGyY","pdf",1994226,"English","# Part A – Warm-Up\n# Part B – Core Practice\n# Part C – Challenge Problems\n## Error Analysis","[{\"question\":\"What should students do when solving the problems?\",\"answer\":\"Find each sum and show regrouping marks clearly for problems that require regrouping.\"},{\"question\":\"What type of challenge problems are included?\",\"answer\":\"The challenge section includes both a word problem about cards and an error analysis task where students evaluate a student’s incorrect addition.\"},{\"question\":\"Where can students check their answers?\",\"answer\":\"An answer key follows the worksheet, listing the correct sums for Parts A, B, and C and the correct evaluation for the error analysis item.\"}]","Multi-Digit Addition Practice (With Regrouping) | PDF",1790141790]