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It serves as an effective practice tool for teachers and parents to assess and improve students' rapid addition capabilities. 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number.  \n1. 36 + 36 =   2. 9 +   = 17  \n3. 98 +   = 101 4. 26 +   = 69  \n5. 15 + 64 =   6. 65 + 23 =    \n7. 24 + 51 =   8.   + 15 = 24  \n9.   + 87 = 101 10. 76 + 10 =    \n11. 50 + 17 =   12. 58 +   = 104  \n13. 73 + 19 =   14. 49 + 47 =    \n15.   + 67 = 96 16. 88 + 18 =    \n17. 98 + 8 =   18. 26 +   = 38  \n19. 43 +   = 65 20.   + 19 = 89  \nMental math: missing numbers (sum under  100)   \nGrade 4 Addition Worksheet  \nFind the missing number.  \n1. 36 + 36 =  72  2. 9 +  8  = 17  \n3. 98 +  3  = 101 4. 26 +  43  = 69  \n5. 15 + 64 =  79  6. 65 + 23 =  88   \n7. 24 + 51 =  75  8.  9  + 15 = 24  \n9.  14  + 87 = 101 10. 76 + 10 =  86   \n11. 50 + 17 =  67  12. 58 +  46  = 104  \n13. 73 + 19 =  92  14. 49 + 47 =  96   \n15.  29  + 67 = 96 16. 88 + 18 =  106   \n17. 98 + 8 =  106  18. 26 +  12  = 38  \n19. 43 +  22  = 65 20.  70  + 19 = 89","cbCaismF6HwjCoOC","https://ap.wps.com/l/cbCaismF6HwjCoOC","pdf",13359,"English","# Mental Math Missing Numbers\n## Addition Practice Exercises","[{\"question\":\"What is the primary objective of this worksheet?\",\"answer\":\"The primary objective is to improve students' mental math skills by solving for missing addends or sums in addition equations.\"},{\"question\":\"Who is this worksheet designed for?\",\"answer\":\"This worksheet is specifically designed for Grade 4 students to practice their addition fluency.\"},{\"question\":\"How many problems are included in this worksheet?\",\"answer\":\"The worksheet contains 20 distinct addition problems with missing values, complete with an answer key for verification.\"}]","Grade 4 Addition - Mental Math Missing Number Worksheet | PDF"]