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number.  \n1. 27 +   = 205 2.   + 698 = 762  \n3. 14 + 88 =   4.   + 768 = 811  \n5.   + 829 = 921 6.   + 400 = 408  \n7.   + 177 = 181 8. 97 +   = 321  \n9. 31 + 48 =   10. 20 +   = 150  \n11. 96 + 606 =   12. 44 + 589 =    \n13. 59 +   = 83 14. 82 +   = 711  \n15.   + 353 = 391 16. 54 +   = 649  \n17. 72 +   = 772 18. 78 +   = 404  \n19. 41 +   = 258 20. 10 +   = 319  \nMental math: missing numbers  \n (sum under 1,000)   \nGrade 4 Addition Worksheet  \nFind the missing number.  \n1. 27 +  178 = 205 2.  64  + 698 = 762  \n3. 14 + 88 =  102  4.  43  + 768 = 811  \n5.  92  + 829 = 921 6.  8  + 400 = 408  \n7.  4  + 177 = 181 8. 97 +  224 = 321  \n9. 31 + 48 =  79  10. 20 +  130 = 150  \n11. 96 + 606 =  702  12. 44 + 589 =  633   \n13. 59 +  24  = 83 14. 82 +  629 = 711  \n15.  38  + 353 = 391 16. 54 +  595 = 649  \n17. 72 +  700 = 772 18. 78 +  326 = 404  \n19. 41 +  217 = 258 20. 10 +  309 = 319","cbCaibQXVuVXMHdt","https://ap.wps.com/l/cbCaibQXVuVXMHdt","pdf",13449,"English","# Mental Math Practice\n## Addition Problems (Sums Under 1,000)","[{\"question\":\"What is the objective of this worksheet?\",\"answer\":\"The objective is to help fourth-grade students practice mental math by identifying missing addends in addition problems with sums up to 1,000.\"},{\"question\":\"Are the answers included in the document?\",\"answer\":\"Yes, the document provides the full list of missing numbers for all twenty arithmetic problems.\"},{\"question\":\"What is the range of the numbers used in these problems?\",\"answer\":\"The problems involve addition operations where the total sum is always less than 1,000.\"}]","Mental Math - Missing Numbers - Grade 4 Addition Worksheet | PDF"]