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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 89 · 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. 1.80 + 62 =
  2. 2.63 + 72 =
  3. 3.71 + 54 =
  4. 4.68 + 18 =
  5. 5.58 + 71 =
  6. 6.32 + 84 =
  7. 7.54 + 66 =
  8. 8.28 + 81 =
  9. 9.57 + 87 =
  10. 10.81 + 67 =
  11. 11.33 + 82 =
  12. 12.34 + 55 =
  13. 13.39 + 68 =
  14. 14.29 + 32 =
  15. 15.28 + 31 =
  16. 16.70 + 76 =
  17. 17.68 + 35 =
  18. 18.60 + 59 =
  19. 19.86 + 72 =
  20. 20.69 + 32 =
  21. 21.41 + 52 =
  22. 22.67 + 46 =
  23. 23.88 + 18 =
  24. 24.71 + 62 =
  25. 25.78 + 46 =
  26. 26.51 + 39 =
  27. 27.28 + 39 =
  28. 28.32 + 63 =
  29. 29.42 + 78 =
  30. 30.37 + 87 =
  31. 31.81 + 47 =
  32. 32.22 + 19 =
  33. 33.57 + 26 =
  34. 34.46 + 24 =
  35. 35.56 + 49 =
  36. 36.76 + 19 =
  37. 37.82 + 29 =
  38. 38.63 + 12 =
  39. 39.30 + 59 =
  40. 40.21 + 37 =

Answer key

  1. 142
  2. 135
  3. 125
  4. 86
  5. 129
  6. 116
  7. 120
  8. 109
  9. 144
  10. 148
  11. 115
  12. 89
  13. 107
  14. 61
  15. 59
  16. 146
  17. 103
  18. 119
  19. 158
  20. 101
  21. 93
  22. 113
  23. 106
  24. 133
  25. 124
  26. 90
  27. 67
  28. 95
  29. 120
  30. 124
  31. 128
  32. 41
  33. 83
  34. 70
  35. 105
  36. 95
  37. 111
  38. 75
  39. 89
  40. 58

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