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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 677 · 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. 1.33 + 88 =
  2. 2.23 + 58 =
  3. 3.70 + 67 =
  4. 4.37 + 47 =
  5. 5.37 + 31 =
  6. 6.38 + 74 =
  7. 7.83 + 41 =
  8. 8.55 + 61 =
  9. 9.44 + 54 =
  10. 10.57 + 85 =
  11. 11.51 + 29 =
  12. 12.29 + 55 =
  13. 13.71 + 62 =
  14. 14.72 + 34 =
  15. 15.35 + 55 =
  16. 16.67 + 64 =
  17. 17.37 + 57 =
  18. 18.41 + 36 =
  19. 19.67 + 36 =
  20. 20.64 + 19 =
  21. 21.23 + 42 =
  22. 22.36 + 57 =
  23. 23.69 + 49 =
  24. 24.69 + 69 =
  25. 25.33 + 84 =
  26. 26.40 + 76 =
  27. 27.29 + 58 =
  28. 28.30 + 29 =
  29. 29.33 + 35 =
  30. 30.27 + 69 =
  31. 31.39 + 23 =
  32. 32.86 + 84 =
  33. 33.75 + 84 =
  34. 34.40 + 85 =
  35. 35.41 + 77 =
  36. 36.62 + 29 =
  37. 37.22 + 45 =
  38. 38.56 + 87 =
  39. 39.29 + 66 =
  40. 40.88 + 52 =

Answer key

  1. 121
  2. 81
  3. 137
  4. 84
  5. 68
  6. 112
  7. 124
  8. 116
  9. 98
  10. 142
  11. 80
  12. 84
  13. 133
  14. 106
  15. 90
  16. 131
  17. 94
  18. 77
  19. 103
  20. 83
  21. 65
  22. 93
  23. 118
  24. 138
  25. 117
  26. 116
  27. 87
  28. 59
  29. 68
  30. 96
  31. 62
  32. 170
  33. 159
  34. 125
  35. 118
  36. 91
  37. 67
  38. 143
  39. 95
  40. 140

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