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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 98 · 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. 1.58 + 63 =
  2. 2.84 + 61 =
  3. 3.43 + 88 =
  4. 4.39 + 79 =
  5. 5.37 + 55 =
  6. 6.68 + 25 =
  7. 7.45 + 64 =
  8. 8.35 + 25 =
  9. 9.69 + 61 =
  10. 10.84 + 18 =
  11. 11.67 + 33 =
  12. 12.34 + 31 =
  13. 13.30 + 55 =
  14. 14.65 + 26 =
  15. 15.78 + 88 =
  16. 16.88 + 13 =
  17. 17.43 + 62 =
  18. 18.54 + 48 =
  19. 19.55 + 87 =
  20. 20.54 + 16 =
  21. 21.52 + 54 =
  22. 22.65 + 25 =
  23. 23.29 + 59 =
  24. 24.45 + 22 =
  25. 25.74 + 19 =
  26. 26.71 + 58 =
  27. 27.57 + 59 =
  28. 28.30 + 72 =
  29. 29.31 + 21 =
  30. 30.86 + 67 =
  31. 31.64 + 83 =
  32. 32.54 + 74 =
  33. 33.89 + 71 =
  34. 34.48 + 51 =
  35. 35.56 + 68 =
  36. 36.71 + 26 =
  37. 37.55 + 16 =
  38. 38.84 + 15 =
  39. 39.32 + 82 =
  40. 40.75 + 79 =

Answer key

  1. 121
  2. 145
  3. 131
  4. 118
  5. 92
  6. 93
  7. 109
  8. 60
  9. 130
  10. 102
  11. 100
  12. 65
  13. 85
  14. 91
  15. 166
  16. 101
  17. 105
  18. 102
  19. 142
  20. 70
  21. 106
  22. 90
  23. 88
  24. 67
  25. 93
  26. 129
  27. 116
  28. 102
  29. 52
  30. 153
  31. 147
  32. 128
  33. 160
  34. 99
  35. 124
  36. 97
  37. 71
  38. 99
  39. 114
  40. 154

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