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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 552 · 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. 1.65 + 42 =
  2. 2.62 + 15 =
  3. 3.76 + 73 =
  4. 4.48 + 48 =
  5. 5.70 + 69 =
  6. 6.83 + 68 =
  7. 7.48 + 15 =
  8. 8.88 + 18 =
  9. 9.57 + 27 =
  10. 10.83 + 61 =
  11. 11.89 + 14 =
  12. 12.77 + 71 =
  13. 13.37 + 33 =
  14. 14.82 + 57 =
  15. 15.29 + 63 =
  16. 16.25 + 86 =
  17. 17.38 + 23 =
  18. 18.73 + 86 =
  19. 19.50 + 23 =
  20. 20.47 + 51 =
  21. 21.28 + 89 =
  22. 22.80 + 75 =
  23. 23.60 + 87 =
  24. 24.82 + 64 =
  25. 25.62 + 27 =
  26. 26.34 + 25 =
  27. 27.34 + 45 =
  28. 28.40 + 89 =
  29. 29.48 + 67 =
  30. 30.27 + 83 =
  31. 31.38 + 82 =
  32. 32.64 + 24 =
  33. 33.37 + 23 =
  34. 34.70 + 34 =
  35. 35.82 + 36 =
  36. 36.47 + 41 =
  37. 37.57 + 88 =
  38. 38.83 + 25 =
  39. 39.68 + 15 =
  40. 40.40 + 23 =

Answer key

  1. 107
  2. 77
  3. 149
  4. 96
  5. 139
  6. 151
  7. 63
  8. 106
  9. 84
  10. 144
  11. 103
  12. 148
  13. 70
  14. 139
  15. 92
  16. 111
  17. 61
  18. 159
  19. 73
  20. 98
  21. 117
  22. 155
  23. 147
  24. 146
  25. 89
  26. 59
  27. 79
  28. 129
  29. 115
  30. 110
  31. 120
  32. 88
  33. 60
  34. 104
  35. 118
  36. 88
  37. 145
  38. 108
  39. 83
  40. 63

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