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Each problem is presented with the correct solution, allowing students to verify their work and improve their numerical fluency. By focusing on rapid mental computation, this worksheet helps strengthen foundational arithmetic abilities in young learners, ensuring they develop confidence and accuracy in handling multi-addend addition scenarios. The material is part of a series provided by K5 Learning, emphasizing structured and effective math skill development for early elementary 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+ 4 + 66 =   2. 79 + 69 + 2 =   3. 95 + 28 + 8 =   4. 32 + 1 + 23 =   5. 72 + 5 + 46 =   6. 39 + 5 + 4 =   7. 33 + 6 + 8 =   8. 49 + 85 + 7 =   9. 47 + 59 + 82 =   10. 7 + 3 + 24 =   11. 4 + 60 + 84 =   12. 21 + 26 + 3 =   13. 32 + 4 + 4 =   14. 76 + 5 + 48 =   15. 33 + 49 + 5 =   16. 53 + 28 + 7 =   17. 27 + 70 + 38 =   18. 44 + 60 + 4 =    \n19. 11 + 9 + 10 =   20. 97 + 5 + 63 =    \nOnline reading & math for K-5 © [www.k5learning.com](www.k5learning.com)  \nMental math: adding three 1 and 2-digit numbers  \nGrade 4 Addition Worksheet  \nFind the sum.  \n1. 25 + 4 + 66 =  95  2. 79 + 69 + 2 =  150   \n3. 95 + 28 + 8 =  131  4. 32 + 1 + 23 =  56   \n5. 72 + 5 + 46 =  123  6. 39 + 5 + 4 =  48   \n7. 33 + 6 + 8 =  47  8. 49 + 85 + 7 =  141   \n9. 47 + 59 + 82 =  188  10. 7 + 3 + 24 =  34   \n11. 4 + 60 + 84 =  148  12. 21 + 26 + 3 =  50   \n13. 32 + 4 + 4 =  40  14. 76 + 5 + 48 =  129   \n15. 33 + 49 + 5 =  87  16. 53 + 28 + 7 =  88   \n17. 27 + 70 + 38 =  135  18. 44 + 60 + 4 =  108   \n19. 11 + 9 + 10 =  30  20. 97 + 5 + 63 =  165","cbCairqwEMiYOVfi","https://ap.wps.com/l/cbCairqwEMiYOVfi","pdf",13659,"English","# Mental Math Practice\n## Addition Problems\n## Answer Key","[{\"question\":\"What is the primary focus of this worksheet?\",\"answer\":\"This worksheet focuses on mental math practice, specifically adding three numbers that are either 1-digit or 2-digit values.\"},{\"question\":\"How many addition problems are included?\",\"answer\":\"There are 20 individual addition problems provided in this document.\"},{\"question\":\"Who is the target audience for this educational material?\",\"answer\":\"This worksheet is designed for Grade 4 students as part of their elementary math curriculum.\"}]","Grade 4 Mental Math Addition Worksheet - Adding Three 1 and 2-Digit Numbers | PDF"]