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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 245 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.50 + 76 =
  2. 2.69 + 22 =
  3. 3.61 + 17 =
  4. 4.80 + 59 =
  5. 5.46 + 19 =
  6. 6.34 + 28 =
  7. 7.78 + 63 =
  8. 8.26 + 14 =
  9. 9.22 + 27 =
  10. 10.60 + 85 =
  11. 11.33 + 25 =
  12. 12.87 + 58 =
  13. 13.51 + 21 =
  14. 14.37 + 42 =
  15. 15.42 + 66 =
  16. 16.66 + 86 =
  17. 17.21 + 28 =
  18. 18.25 + 35 =
  19. 19.32 + 64 =
  20. 20.50 + 23 =
  21. 21.52 + 88 =
  22. 22.56 + 46 =
  23. 23.77 + 68 =
  24. 24.56 + 38 =
  25. 25.83 + 71 =
  26. 26.56 + 81 =
  27. 27.26 + 41 =
  28. 28.61 + 27 =
  29. 29.23 + 77 =
  30. 30.31 + 28 =
  31. 31.57 + 85 =
  32. 32.81 + 35 =
  33. 33.56 + 21 =
  34. 34.54 + 38 =
  35. 35.33 + 85 =
  36. 36.80 + 33 =
  37. 37.77 + 83 =
  38. 38.24 + 59 =
  39. 39.43 + 13 =
  40. 40.67 + 42 =

Answer key

  1. 126
  2. 91
  3. 78
  4. 139
  5. 65
  6. 62
  7. 141
  8. 40
  9. 49
  10. 145
  11. 58
  12. 145
  13. 72
  14. 79
  15. 108
  16. 152
  17. 49
  18. 60
  19. 96
  20. 73
  21. 140
  22. 102
  23. 145
  24. 94
  25. 154
  26. 137
  27. 67
  28. 88
  29. 100
  30. 59
  31. 142
  32. 116
  33. 77
  34. 92
  35. 118
  36. 113
  37. 160
  38. 83
  39. 56
  40. 109

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