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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 138 · 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. 1.41 + 57 =
  2. 2.45 + 34 =
  3. 3.88 + 75 =
  4. 4.76 + 72 =
  5. 5.31 + 76 =
  6. 6.71 + 51 =
  7. 7.70 + 21 =
  8. 8.38 + 66 =
  9. 9.23 + 53 =
  10. 10.35 + 64 =
  11. 11.78 + 78 =
  12. 12.47 + 31 =
  13. 13.82 + 71 =
  14. 14.83 + 51 =
  15. 15.38 + 77 =
  16. 16.32 + 58 =
  17. 17.55 + 72 =
  18. 18.61 + 45 =
  19. 19.88 + 32 =
  20. 20.78 + 31 =
  21. 21.51 + 43 =
  22. 22.84 + 31 =
  23. 23.76 + 44 =
  24. 24.81 + 72 =
  25. 25.52 + 19 =
  26. 26.27 + 54 =
  27. 27.49 + 45 =
  28. 28.84 + 78 =
  29. 29.74 + 23 =
  30. 30.32 + 59 =
  31. 31.29 + 12 =
  32. 32.22 + 55 =
  33. 33.76 + 84 =
  34. 34.25 + 63 =
  35. 35.47 + 17 =
  36. 36.85 + 36 =
  37. 37.70 + 46 =
  38. 38.31 + 42 =
  39. 39.62 + 89 =
  40. 40.22 + 76 =

Answer key

  1. 98
  2. 79
  3. 163
  4. 148
  5. 107
  6. 122
  7. 91
  8. 104
  9. 76
  10. 99
  11. 156
  12. 78
  13. 153
  14. 134
  15. 115
  16. 90
  17. 127
  18. 106
  19. 120
  20. 109
  21. 94
  22. 115
  23. 120
  24. 153
  25. 71
  26. 81
  27. 94
  28. 162
  29. 97
  30. 91
  31. 41
  32. 77
  33. 160
  34. 88
  35. 64
  36. 121
  37. 116
  38. 73
  39. 151
  40. 98

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