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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 635 · 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. 1.37 + 24 =
  2. 2.53 + 55 =
  3. 3.33 + 61 =
  4. 4.54 + 19 =
  5. 5.23 + 19 =
  6. 6.61 + 44 =
  7. 7.56 + 27 =
  8. 8.61 + 81 =
  9. 9.57 + 14 =
  10. 10.36 + 32 =
  11. 11.51 + 34 =
  12. 12.54 + 36 =
  13. 13.58 + 29 =
  14. 14.84 + 12 =
  15. 15.31 + 51 =
  16. 16.22 + 32 =
  17. 17.77 + 17 =
  18. 18.48 + 12 =
  19. 19.38 + 48 =
  20. 20.75 + 41 =
  21. 21.21 + 31 =
  22. 22.43 + 45 =
  23. 23.54 + 38 =
  24. 24.85 + 68 =
  25. 25.50 + 21 =
  26. 26.87 + 54 =
  27. 27.27 + 67 =
  28. 28.80 + 81 =
  29. 29.75 + 83 =
  30. 30.53 + 41 =
  31. 31.32 + 69 =
  32. 32.40 + 24 =
  33. 33.37 + 88 =
  34. 34.39 + 43 =
  35. 35.66 + 77 =
  36. 36.30 + 63 =
  37. 37.87 + 17 =
  38. 38.23 + 22 =
  39. 39.33 + 31 =
  40. 40.86 + 51 =

Answer key

  1. 61
  2. 108
  3. 94
  4. 73
  5. 42
  6. 105
  7. 83
  8. 142
  9. 71
  10. 68
  11. 85
  12. 90
  13. 87
  14. 96
  15. 82
  16. 54
  17. 94
  18. 60
  19. 86
  20. 116
  21. 52
  22. 88
  23. 92
  24. 153
  25. 71
  26. 141
  27. 94
  28. 161
  29. 158
  30. 94
  31. 101
  32. 64
  33. 125
  34. 82
  35. 143
  36. 93
  37. 104
  38. 45
  39. 64
  40. 137

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