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number.  \n1. 49 +   = 204 2. 38 +   = 543  \n3. 7 + 661 =   4. 77 + 215 =    \n5.   + 803 = 870 6. 98 +   = 553  \n7. 35 + 296 =   8. 77 +   = 738  \n9. 73 + 58 =   10.   + 115 = 126  \n11. 27 + 794 =   12.   + 574 = 613  \n13. 29 + 479 =   14.   + 331 = 399  \n15. 39 +   = 693 16.   + 95 = 176  \n17. 95 + 890 =   18.   + 817 = 880  \n19. 24 + 933 =   20. 53 + 929 =    \nMental math: missing numbers  \n (sum under 1,000)   \nGrade 4 Addition Worksheet  \nFind the missing number.  \n1. 49 +  155 = 204 2. 38 +  505 = 543  \n3. 7 + 661 =  668  4. 77 + 215 =  292   \n5.  67  + 803 = 870 6. 98 +  455 = 553  \n7. 35 + 296 =  331  8. 77 +  661 = 738  \n9. 73 + 58 =  131  10.  11  + 115 = 126  \n11. 27 + 794 =  821  12.  39  + 574 = 613  \n13. 29 + 479 =  508  14.  68  + 331 = 399  \n15. 39 +  654 = 693 16.  81  + 95 = 176  \n17. 95 + 890 =  985  18.  63  + 817 = 880  \n19. 24 + 933 =  957  20. 53 + 929 =  982","cbCaicKzswZXexYB","https://ap.wps.com/l/cbCaicKzswZXexYB","pdf",13507,"English","# Mental Math Missing Numbers\n## Addition Exercises\n## Answer Key","[{\"question\":\"What is the primary goal of this worksheet?\",\"answer\":\"The primary goal is to help Grade 4 students improve their mental math skills by finding missing numbers in addition problems that sum to less than 1,000.\"},{\"question\":\"How many addition problems are included in this document?\",\"answer\":\"There are 20 addition problems provided in this worksheet.\"},{\"question\":\"Are the answers to the addition problems provided?\",\"answer\":\"Yes, the document includes both the original set of problems and the completed versions with the missing numbers filled in as an answer key.\"}]","Grade 4 Addition - Missing Number Worksheet | PDF"]