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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 485 · 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. 1.89 + 86 =
  2. 2.28 + 14 =
  3. 3.38 + 19 =
  4. 4.83 + 51 =
  5. 5.45 + 17 =
  6. 6.74 + 63 =
  7. 7.30 + 55 =
  8. 8.37 + 33 =
  9. 9.51 + 12 =
  10. 10.44 + 85 =
  11. 11.85 + 51 =
  12. 12.21 + 62 =
  13. 13.38 + 74 =
  14. 14.81 + 29 =
  15. 15.23 + 44 =
  16. 16.89 + 28 =
  17. 17.76 + 74 =
  18. 18.49 + 61 =
  19. 19.29 + 14 =
  20. 20.57 + 83 =
  21. 21.67 + 12 =
  22. 22.27 + 85 =
  23. 23.21 + 16 =
  24. 24.79 + 19 =
  25. 25.34 + 81 =
  26. 26.30 + 75 =
  27. 27.51 + 21 =
  28. 28.26 + 34 =
  29. 29.71 + 22 =
  30. 30.25 + 13 =
  31. 31.62 + 83 =
  32. 32.86 + 63 =
  33. 33.35 + 78 =
  34. 34.34 + 61 =
  35. 35.49 + 32 =
  36. 36.22 + 21 =
  37. 37.24 + 26 =
  38. 38.75 + 21 =
  39. 39.68 + 27 =
  40. 40.25 + 64 =

Answer key

  1. 175
  2. 42
  3. 57
  4. 134
  5. 62
  6. 137
  7. 85
  8. 70
  9. 63
  10. 129
  11. 136
  12. 83
  13. 112
  14. 110
  15. 67
  16. 117
  17. 150
  18. 110
  19. 43
  20. 140
  21. 79
  22. 112
  23. 37
  24. 98
  25. 115
  26. 105
  27. 72
  28. 60
  29. 93
  30. 38
  31. 145
  32. 149
  33. 113
  34. 95
  35. 81
  36. 43
  37. 50
  38. 96
  39. 95
  40. 89

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