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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 444 · 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. 1.71 + 45 =
  2. 2.32 + 78 =
  3. 3.76 + 38 =
  4. 4.89 + 15 =
  5. 5.33 + 72 =
  6. 6.37 + 61 =
  7. 7.25 + 72 =
  8. 8.52 + 65 =
  9. 9.47 + 73 =
  10. 10.32 + 74 =
  11. 11.48 + 21 =
  12. 12.79 + 66 =
  13. 13.59 + 47 =
  14. 14.51 + 52 =
  15. 15.67 + 18 =
  16. 16.37 + 82 =
  17. 17.40 + 16 =
  18. 18.86 + 87 =
  19. 19.35 + 26 =
  20. 20.74 + 71 =
  21. 21.40 + 53 =
  22. 22.78 + 82 =
  23. 23.43 + 22 =
  24. 24.52 + 87 =
  25. 25.23 + 25 =
  26. 26.74 + 83 =
  27. 27.25 + 73 =
  28. 28.72 + 84 =
  29. 29.32 + 37 =
  30. 30.43 + 51 =
  31. 31.38 + 41 =
  32. 32.29 + 88 =
  33. 33.32 + 86 =
  34. 34.58 + 79 =
  35. 35.58 + 27 =
  36. 36.73 + 23 =
  37. 37.74 + 25 =
  38. 38.76 + 71 =
  39. 39.80 + 51 =
  40. 40.62 + 53 =

Answer key

  1. 116
  2. 110
  3. 114
  4. 104
  5. 105
  6. 98
  7. 97
  8. 117
  9. 120
  10. 106
  11. 69
  12. 145
  13. 106
  14. 103
  15. 85
  16. 119
  17. 56
  18. 173
  19. 61
  20. 145
  21. 93
  22. 160
  23. 65
  24. 139
  25. 48
  26. 157
  27. 98
  28. 156
  29. 69
  30. 94
  31. 79
  32. 117
  33. 118
  34. 137
  35. 85
  36. 96
  37. 99
  38. 147
  39. 131
  40. 115

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