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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 44 · 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 + 65 =
  2. 2.57 + 87 =
  3. 3.47 + 38 =
  4. 4.39 + 52 =
  5. 5.58 + 51 =
  6. 6.48 + 65 =
  7. 7.72 + 53 =
  8. 8.82 + 43 =
  9. 9.50 + 23 =
  10. 10.85 + 49 =
  11. 11.28 + 35 =
  12. 12.51 + 32 =
  13. 13.21 + 17 =
  14. 14.65 + 67 =
  15. 15.55 + 68 =
  16. 16.35 + 81 =
  17. 17.37 + 89 =
  18. 18.28 + 89 =
  19. 19.74 + 33 =
  20. 20.23 + 34 =
  21. 21.71 + 34 =
  22. 22.56 + 46 =
  23. 23.76 + 13 =
  24. 24.70 + 74 =
  25. 25.64 + 48 =
  26. 26.47 + 81 =
  27. 27.72 + 15 =
  28. 28.78 + 72 =
  29. 29.57 + 38 =
  30. 30.27 + 85 =
  31. 31.78 + 65 =
  32. 32.31 + 71 =
  33. 33.72 + 59 =
  34. 34.65 + 66 =
  35. 35.75 + 27 =
  36. 36.84 + 26 =
  37. 37.41 + 41 =
  38. 38.34 + 81 =
  39. 39.38 + 78 =
  40. 40.24 + 31 =

Answer key

  1. 151
  2. 144
  3. 85
  4. 91
  5. 109
  6. 113
  7. 125
  8. 125
  9. 73
  10. 134
  11. 63
  12. 83
  13. 38
  14. 132
  15. 123
  16. 116
  17. 126
  18. 117
  19. 107
  20. 57
  21. 105
  22. 102
  23. 89
  24. 144
  25. 112
  26. 128
  27. 87
  28. 150
  29. 95
  30. 112
  31. 143
  32. 102
  33. 131
  34. 131
  35. 102
  36. 110
  37. 82
  38. 115
  39. 116
  40. 55

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