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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 431 · 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. 1.53 + 24 =
  2. 2.37 + 81 =
  3. 3.25 + 45 =
  4. 4.78 + 14 =
  5. 5.48 + 61 =
  6. 6.47 + 34 =
  7. 7.89 + 47 =
  8. 8.24 + 38 =
  9. 9.59 + 88 =
  10. 10.28 + 22 =
  11. 11.64 + 68 =
  12. 12.86 + 27 =
  13. 13.27 + 21 =
  14. 14.45 + 41 =
  15. 15.36 + 33 =
  16. 16.32 + 71 =
  17. 17.59 + 59 =
  18. 18.81 + 31 =
  19. 19.23 + 73 =
  20. 20.71 + 34 =
  21. 21.28 + 54 =
  22. 22.67 + 45 =
  23. 23.86 + 89 =
  24. 24.69 + 22 =
  25. 25.37 + 59 =
  26. 26.23 + 14 =
  27. 27.88 + 31 =
  28. 28.35 + 33 =
  29. 29.72 + 68 =
  30. 30.35 + 32 =
  31. 31.81 + 12 =
  32. 32.65 + 53 =
  33. 33.34 + 72 =
  34. 34.32 + 83 =
  35. 35.58 + 28 =
  36. 36.48 + 31 =
  37. 37.46 + 46 =
  38. 38.77 + 15 =
  39. 39.50 + 86 =
  40. 40.57 + 35 =

Answer key

  1. 77
  2. 118
  3. 70
  4. 92
  5. 109
  6. 81
  7. 136
  8. 62
  9. 147
  10. 50
  11. 132
  12. 113
  13. 48
  14. 86
  15. 69
  16. 103
  17. 118
  18. 112
  19. 96
  20. 105
  21. 82
  22. 112
  23. 175
  24. 91
  25. 96
  26. 37
  27. 119
  28. 68
  29. 140
  30. 67
  31. 93
  32. 118
  33. 106
  34. 115
  35. 86
  36. 79
  37. 92
  38. 92
  39. 136
  40. 92

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