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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 231 · 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. 1.86 + 66 =
  2. 2.59 + 15 =
  3. 3.54 + 45 =
  4. 4.32 + 21 =
  5. 5.27 + 71 =
  6. 6.76 + 71 =
  7. 7.50 + 41 =
  8. 8.38 + 62 =
  9. 9.83 + 73 =
  10. 10.51 + 65 =
  11. 11.47 + 64 =
  12. 12.84 + 58 =
  13. 13.71 + 78 =
  14. 14.43 + 36 =
  15. 15.87 + 27 =
  16. 16.40 + 42 =
  17. 17.65 + 14 =
  18. 18.81 + 66 =
  19. 19.86 + 34 =
  20. 20.72 + 16 =
  21. 21.41 + 43 =
  22. 22.41 + 13 =
  23. 23.74 + 88 =
  24. 24.75 + 73 =
  25. 25.89 + 68 =
  26. 26.76 + 62 =
  27. 27.22 + 82 =
  28. 28.82 + 41 =
  29. 29.64 + 26 =
  30. 30.57 + 81 =
  31. 31.38 + 58 =
  32. 32.60 + 34 =
  33. 33.69 + 44 =
  34. 34.32 + 13 =
  35. 35.51 + 71 =
  36. 36.78 + 18 =
  37. 37.78 + 29 =
  38. 38.87 + 25 =
  39. 39.35 + 85 =
  40. 40.80 + 79 =

Answer key

  1. 152
  2. 74
  3. 99
  4. 53
  5. 98
  6. 147
  7. 91
  8. 100
  9. 156
  10. 116
  11. 111
  12. 142
  13. 149
  14. 79
  15. 114
  16. 82
  17. 79
  18. 147
  19. 120
  20. 88
  21. 84
  22. 54
  23. 162
  24. 148
  25. 157
  26. 138
  27. 104
  28. 123
  29. 90
  30. 138
  31. 96
  32. 94
  33. 113
  34. 45
  35. 122
  36. 96
  37. 107
  38. 112
  39. 120
  40. 159

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