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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 413 · 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. 1.47 + 12 =
  2. 2.51 + 65 =
  3. 3.54 + 45 =
  4. 4.84 + 68 =
  5. 5.32 + 43 =
  6. 6.48 + 25 =
  7. 7.35 + 81 =
  8. 8.59 + 27 =
  9. 9.80 + 45 =
  10. 10.38 + 69 =
  11. 11.53 + 19 =
  12. 12.38 + 33 =
  13. 13.78 + 73 =
  14. 14.33 + 76 =
  15. 15.33 + 28 =
  16. 16.71 + 45 =
  17. 17.77 + 21 =
  18. 18.82 + 83 =
  19. 19.55 + 45 =
  20. 20.55 + 46 =
  21. 21.68 + 29 =
  22. 22.58 + 25 =
  23. 23.85 + 38 =
  24. 24.37 + 58 =
  25. 25.59 + 29 =
  26. 26.75 + 83 =
  27. 27.74 + 57 =
  28. 28.78 + 24 =
  29. 29.51 + 23 =
  30. 30.34 + 73 =
  31. 31.33 + 85 =
  32. 32.82 + 31 =
  33. 33.23 + 43 =
  34. 34.62 + 62 =
  35. 35.84 + 53 =
  36. 36.72 + 22 =
  37. 37.42 + 43 =
  38. 38.84 + 61 =
  39. 39.45 + 59 =
  40. 40.85 + 21 =

Answer key

  1. 59
  2. 116
  3. 99
  4. 152
  5. 75
  6. 73
  7. 116
  8. 86
  9. 125
  10. 107
  11. 72
  12. 71
  13. 151
  14. 109
  15. 61
  16. 116
  17. 98
  18. 165
  19. 100
  20. 101
  21. 97
  22. 83
  23. 123
  24. 95
  25. 88
  26. 158
  27. 131
  28. 102
  29. 74
  30. 107
  31. 118
  32. 113
  33. 66
  34. 124
  35. 137
  36. 94
  37. 85
  38. 145
  39. 104
  40. 106

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