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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 474 · 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. 1.81 + 51 =
  2. 2.53 + 56 =
  3. 3.71 + 79 =
  4. 4.74 + 21 =
  5. 5.71 + 63 =
  6. 6.84 + 65 =
  7. 7.26 + 85 =
  8. 8.59 + 55 =
  9. 9.46 + 33 =
  10. 10.87 + 31 =
  11. 11.31 + 15 =
  12. 12.40 + 71 =
  13. 13.25 + 34 =
  14. 14.88 + 45 =
  15. 15.49 + 21 =
  16. 16.27 + 21 =
  17. 17.60 + 36 =
  18. 18.67 + 27 =
  19. 19.85 + 66 =
  20. 20.21 + 56 =
  21. 21.72 + 35 =
  22. 22.25 + 17 =
  23. 23.88 + 49 =
  24. 24.61 + 61 =
  25. 25.80 + 34 =
  26. 26.80 + 48 =
  27. 27.42 + 62 =
  28. 28.36 + 52 =
  29. 29.89 + 32 =
  30. 30.73 + 36 =
  31. 31.83 + 57 =
  32. 32.44 + 84 =
  33. 33.46 + 16 =
  34. 34.43 + 79 =
  35. 35.54 + 52 =
  36. 36.24 + 59 =
  37. 37.62 + 56 =
  38. 38.59 + 29 =
  39. 39.60 + 31 =
  40. 40.31 + 77 =

Answer key

  1. 132
  2. 109
  3. 150
  4. 95
  5. 134
  6. 149
  7. 111
  8. 114
  9. 79
  10. 118
  11. 46
  12. 111
  13. 59
  14. 133
  15. 70
  16. 48
  17. 96
  18. 94
  19. 151
  20. 77
  21. 107
  22. 42
  23. 137
  24. 122
  25. 114
  26. 128
  27. 104
  28. 88
  29. 121
  30. 109
  31. 140
  32. 128
  33. 62
  34. 122
  35. 106
  36. 83
  37. 118
  38. 88
  39. 91
  40. 108

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