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18  \n5. 323  \n722  \n+ 849  \n9. 291 400  \n+ 978  \n13. 101 190 + 288  \n2. 468 821  \n+ 402  \n6. 539 517  \n+ 418  \n10. 368  \n241  \n+ 859  \n14. 601 378 + 778  \n3. 65 573  \n+ 241  \n7. 114  \n644 + 183  \n11. 265 319  \n+ 793  \n15. 931  \n727  \n+ 690  \n4. 385  \n27  \n+ 384  \n8. 720  \n224  \n+ 82  \n12. 853 853 + 198  \n16. 137 842  \n+ 24  \nAdding three 3-digit numbers in columns  \nGrade 4 Addition Worksheet  \nFind the sum.  \n1. 103 448 + 18 569  \n5. 323  \n722  \n+ 849  \n 1,894  \n9. 291 400 + 978  \n 1,669  \n13. 101 190 + 288  579  \n2. 468 821 + 402  \n 1,691  \n6. 539 517 + 418  \n 1,474  \n10. 368  \n241  \n+ 859  \n 1,468  \n14. 601 378 + 778  \n 1,757  \n3. 65 573  \n+ 241  \n 879  \n7. 114  \n644 + 183 941  \n11. 265 319 + 793  \n 1,377  \n15. 931  \n727  \n+ 690  \n 2,348  \n4. 385  \n27  \n+ 384  796  \n8. 720  \n224  \n+ 82  \n 1,026  \n12. 853 853 + 198  \n 1,904  \n16. 137 842  \n+ 24  \n 1,003  \nOnline reading & math for K-5 © [www.k5learning.com](www.k5learning.com)","cbCaidw9yv2TQw3L","https://ap.wps.com/l/cbCaidw9yv2TQw3L","pdf",14415,"English","# Addition Practice Problems\n## Answer Key","[{\"question\":\"What level of mathematics is this worksheet intended for?\",\"answer\":\"This worksheet is designed for 4th-grade students as an addition practice exercise.\"},{\"question\":\"How many addition problems are included in this document?\",\"answer\":\"There are 16 individual addition problems involving the summing of three 3-digit numbers.\"},{\"question\":\"What is the core focus of these exercises?\",\"answer\":\"The primary focus is to help students practice adding three 3-digit numbers using columnar addition.\"}]","Adding Three 3-Digit Numbers - Grade 4 Addition Worksheet | PDF"]