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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 415 · 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. 1.29 + 59 =
  2. 2.62 + 89 =
  3. 3.77 + 64 =
  4. 4.42 + 17 =
  5. 5.42 + 48 =
  6. 6.87 + 85 =
  7. 7.31 + 71 =
  8. 8.49 + 55 =
  9. 9.22 + 22 =
  10. 10.75 + 84 =
  11. 11.59 + 22 =
  12. 12.44 + 89 =
  13. 13.53 + 31 =
  14. 14.63 + 73 =
  15. 15.68 + 87 =
  16. 16.56 + 42 =
  17. 17.22 + 18 =
  18. 18.61 + 84 =
  19. 19.31 + 58 =
  20. 20.80 + 41 =
  21. 21.23 + 57 =
  22. 22.67 + 14 =
  23. 23.80 + 67 =
  24. 24.85 + 71 =
  25. 25.67 + 36 =
  26. 26.78 + 35 =
  27. 27.44 + 44 =
  28. 28.60 + 23 =
  29. 29.85 + 88 =
  30. 30.54 + 66 =
  31. 31.58 + 42 =
  32. 32.65 + 84 =
  33. 33.85 + 21 =
  34. 34.77 + 62 =
  35. 35.74 + 61 =
  36. 36.36 + 13 =
  37. 37.33 + 86 =
  38. 38.35 + 77 =
  39. 39.49 + 36 =
  40. 40.80 + 12 =

Answer key

  1. 88
  2. 151
  3. 141
  4. 59
  5. 90
  6. 172
  7. 102
  8. 104
  9. 44
  10. 159
  11. 81
  12. 133
  13. 84
  14. 136
  15. 155
  16. 98
  17. 40
  18. 145
  19. 89
  20. 121
  21. 80
  22. 81
  23. 147
  24. 156
  25. 103
  26. 113
  27. 88
  28. 83
  29. 173
  30. 120
  31. 100
  32. 149
  33. 106
  34. 139
  35. 135
  36. 49
  37. 119
  38. 112
  39. 85
  40. 92

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