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+ 82 + 62 =   2. 70 + 3 + 18 =   3. 2 + 6 + 8 =   4. 6 + 45 + 6 =   5. 20 + 8 + 3 =   6. 4 + 5 + 89 =   7. 98 + 4 + 7 =   8. 48 + 33 + 59 =   9. 3 + 33 + 3 =   10. 4 + 4 + 60 =   11. 8 + 9 + 37 =   12. 85 + 2 + 30 =   13. 76 + 2 + 72 =   14. 63 + 8 + 29 =   15. 3 + 8 + 5 =   16. 51 + 6 + 5 =   17. 73 + 51 + 8 =   18. 2 + 6 + 40 =    \n19. 3 + 60 + 4 =   20. 3 + 1 + 59 =    \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. 45 + 82 + 62 =  189  2. 70 + 3 + 18 =  91   \n3. 2 + 6 + 8 =  16  4. 6 + 45 + 6 =  57   \n5. 20 + 8 + 3 =  31  6. 4 + 5 + 89 =  98   \n7. 98 + 4 + 7 =  109  8. 48 + 33 + 59 =  140   \n9. 3 + 33 + 3 =  39  10. 4 + 4 + 60 =  68   \n11. 8 + 9 + 37 =  54  12. 85 + 2 + 30 =  117   \n13. 76 + 2 + 72 =  150  14. 63 + 8 + 29 =  100   \n15. 3 + 8 + 5 =  16  16. 51 + 6 + 5 =  62   \n17. 73 + 51 + 8 =  132  18. 2 + 6 + 40 =  48   \n19. 3 + 60 + 4 =  67  20. 3 + 1 + 59 =  63","cbCaitV1NNdXwqRP","https://ap.wps.com/l/cbCaitV1NNdXwqRP","pdf",13740,"English","# Mental Math Addition Practice\n## Arithmetic Exercises\n## Answer Key","[{\"question\":\"What is the primary focus of this worksheet?\",\"answer\":\"The worksheet focuses on mental math skills by requiring students to find the sum of three numbers, which are a mix of one and two-digit integers.\"},{\"question\":\"How many problems are included in the exercise sets?\",\"answer\":\"Each set consists of 20 individual addition problems designed to test and improve student arithmetic speed and accuracy.\"},{\"question\":\"Is there an answer key provided?\",\"answer\":\"Yes, the document includes a completed section where each of the 20 problems is paired with its correct sum, facilitating self-assessment for students.\"}]","Grade 4 Addition - Mental Math Practice | PDF"]