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\n1. 78 + 10 =   2. 52 + 35 =   3. 38 + 40 =   4. 40 + 28 =   5. 21 + 58 =   6. 14 + 81 =   7. 5 + 50 =   8. 34 + 22 =   9. 53 + 21 =   10. 36 + 11 =   11. 80 + 16 =   12. 1 + 91 =   13. 15 + 44 =   14. 51 + 33 =   15. 56 + 32 =   16. 77 + 12 =   17. 70 + 16 =   18. 33 + 61 =    \n19. 59 + 0 =   20. 46 + 20 =    \nMental math: adding two 2-digit numbers  (no carrying)   \nGrade 4 Addition Worksheet  \nFind the sum.  \n1. 78 + 10 =  88  2. 52 + 35 =  87   \n3. 38 + 40 =  78  4. 40 + 28 =  68   \n5. 21 + 58 =  79  6. 14 + 81 =  95   \n7. 5 + 50 =  55  8. 34 + 22 =  56   \n9. 53 + 21 =  74  10. 36 + 11 =  47   \n11. 80 + 16 =  96  12. 1 + 91 =  92   \n13. 15 + 44 =  59  14. 51 + 33 =  84   \n15. 56 + 32 =  88  16. 77 + 12 =  89   \n17. 70 + 16 =  86  18. 33 + 61 =  94   \n19. 59 + 0 =  59  20. 46 + 20 =  66","cbCairnQ7kiPrQot","https://ap.wps.com/l/cbCairnQ7kiPrQot","pdf",13175,"English","# Mental Math Addition Exercises\n## Answer Key","[{\"question\":\"What type of addition problems are included in this worksheet?\",\"answer\":\"This worksheet includes mental math addition problems involving two 2-digit numbers that do not require carrying.\"},{\"question\":\"What grade level is this addition worksheet designed for?\",\"answer\":\"The worksheet is specifically tailored for Grade 4 students to practice their mental arithmetic skills.\"},{\"question\":\"How many addition problems does this document contain?\",\"answer\":\"The document contains 20 practice problems, presented in two formats: one without answers for students and one with the correct sums included.\"}]","Grade 4 Addition Worksheet - Mental Math: Adding Two 2-Digit Numbers | PDF"]