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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 419 · 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. 1.69 + 66 =
  2. 2.81 + 36 =
  3. 3.74 + 41 =
  4. 4.58 + 22 =
  5. 5.34 + 19 =
  6. 6.45 + 13 =
  7. 7.59 + 21 =
  8. 8.46 + 71 =
  9. 9.45 + 65 =
  10. 10.37 + 23 =
  11. 11.75 + 21 =
  12. 12.62 + 85 =
  13. 13.38 + 21 =
  14. 14.30 + 79 =
  15. 15.70 + 81 =
  16. 16.29 + 64 =
  17. 17.54 + 89 =
  18. 18.86 + 65 =
  19. 19.35 + 23 =
  20. 20.86 + 31 =
  21. 21.76 + 69 =
  22. 22.24 + 41 =
  23. 23.57 + 28 =
  24. 24.36 + 74 =
  25. 25.85 + 27 =
  26. 26.52 + 33 =
  27. 27.47 + 44 =
  28. 28.77 + 86 =
  29. 29.71 + 12 =
  30. 30.35 + 39 =
  31. 31.73 + 47 =
  32. 32.29 + 14 =
  33. 33.37 + 22 =
  34. 34.24 + 16 =
  35. 35.40 + 84 =
  36. 36.85 + 15 =
  37. 37.30 + 68 =
  38. 38.55 + 46 =
  39. 39.50 + 81 =
  40. 40.72 + 24 =

Answer key

  1. 135
  2. 117
  3. 115
  4. 80
  5. 53
  6. 58
  7. 80
  8. 117
  9. 110
  10. 60
  11. 96
  12. 147
  13. 59
  14. 109
  15. 151
  16. 93
  17. 143
  18. 151
  19. 58
  20. 117
  21. 145
  22. 65
  23. 85
  24. 110
  25. 112
  26. 85
  27. 91
  28. 163
  29. 83
  30. 74
  31. 120
  32. 43
  33. 59
  34. 40
  35. 124
  36. 100
  37. 98
  38. 101
  39. 131
  40. 96

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