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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 391 · 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. 1.46 + 63 =
  2. 2.34 + 53 =
  3. 3.47 + 51 =
  4. 4.72 + 22 =
  5. 5.49 + 32 =
  6. 6.31 + 62 =
  7. 7.42 + 39 =
  8. 8.49 + 21 =
  9. 9.66 + 51 =
  10. 10.57 + 28 =
  11. 11.63 + 26 =
  12. 12.63 + 33 =
  13. 13.72 + 61 =
  14. 14.77 + 21 =
  15. 15.27 + 31 =
  16. 16.48 + 22 =
  17. 17.87 + 39 =
  18. 18.26 + 61 =
  19. 19.25 + 59 =
  20. 20.33 + 55 =
  21. 21.47 + 88 =
  22. 22.75 + 22 =
  23. 23.21 + 37 =
  24. 24.86 + 32 =
  25. 25.25 + 39 =
  26. 26.58 + 71 =
  27. 27.29 + 34 =
  28. 28.70 + 31 =
  29. 29.26 + 44 =
  30. 30.57 + 47 =
  31. 31.87 + 16 =
  32. 32.36 + 23 =
  33. 33.42 + 61 =
  34. 34.75 + 72 =
  35. 35.85 + 22 =
  36. 36.88 + 71 =
  37. 37.54 + 71 =
  38. 38.47 + 14 =
  39. 39.54 + 51 =
  40. 40.24 + 64 =

Answer key

  1. 109
  2. 87
  3. 98
  4. 94
  5. 81
  6. 93
  7. 81
  8. 70
  9. 117
  10. 85
  11. 89
  12. 96
  13. 133
  14. 98
  15. 58
  16. 70
  17. 126
  18. 87
  19. 84
  20. 88
  21. 135
  22. 97
  23. 58
  24. 118
  25. 64
  26. 129
  27. 63
  28. 101
  29. 70
  30. 104
  31. 103
  32. 59
  33. 103
  34. 147
  35. 107
  36. 159
  37. 125
  38. 61
  39. 105
  40. 88

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