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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 651 · 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. 1.51 + 81 =
  2. 2.79 + 16 =
  3. 3.39 + 85 =
  4. 4.58 + 63 =
  5. 5.30 + 46 =
  6. 6.57 + 43 =
  7. 7.36 + 59 =
  8. 8.51 + 76 =
  9. 9.27 + 38 =
  10. 10.42 + 73 =
  11. 11.71 + 78 =
  12. 12.34 + 42 =
  13. 13.45 + 31 =
  14. 14.22 + 34 =
  15. 15.43 + 18 =
  16. 16.84 + 65 =
  17. 17.38 + 14 =
  18. 18.75 + 29 =
  19. 19.85 + 75 =
  20. 20.46 + 23 =
  21. 21.46 + 85 =
  22. 22.26 + 61 =
  23. 23.28 + 37 =
  24. 24.42 + 71 =
  25. 25.22 + 75 =
  26. 26.33 + 19 =
  27. 27.78 + 76 =
  28. 28.33 + 46 =
  29. 29.88 + 57 =
  30. 30.76 + 21 =
  31. 31.70 + 51 =
  32. 32.27 + 66 =
  33. 33.54 + 71 =
  34. 34.51 + 86 =
  35. 35.43 + 76 =
  36. 36.80 + 21 =
  37. 37.71 + 31 =
  38. 38.22 + 28 =
  39. 39.85 + 83 =
  40. 40.34 + 88 =

Answer key

  1. 132
  2. 95
  3. 124
  4. 121
  5. 76
  6. 100
  7. 95
  8. 127
  9. 65
  10. 115
  11. 149
  12. 76
  13. 76
  14. 56
  15. 61
  16. 149
  17. 52
  18. 104
  19. 160
  20. 69
  21. 131
  22. 87
  23. 65
  24. 113
  25. 97
  26. 52
  27. 154
  28. 79
  29. 145
  30. 97
  31. 121
  32. 93
  33. 125
  34. 137
  35. 119
  36. 101
  37. 102
  38. 50
  39. 168
  40. 122

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