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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 503 · 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. 1.24 + 64 =
  2. 2.80 + 71 =
  3. 3.30 + 59 =
  4. 4.88 + 22 =
  5. 5.32 + 23 =
  6. 6.89 + 61 =
  7. 7.86 + 52 =
  8. 8.48 + 38 =
  9. 9.26 + 27 =
  10. 10.67 + 42 =
  11. 11.30 + 49 =
  12. 12.80 + 22 =
  13. 13.66 + 58 =
  14. 14.38 + 73 =
  15. 15.47 + 66 =
  16. 16.88 + 19 =
  17. 17.88 + 44 =
  18. 18.81 + 88 =
  19. 19.35 + 71 =
  20. 20.31 + 13 =
  21. 21.78 + 63 =
  22. 22.61 + 87 =
  23. 23.60 + 14 =
  24. 24.86 + 41 =
  25. 25.57 + 58 =
  26. 26.33 + 23 =
  27. 27.40 + 61 =
  28. 28.27 + 24 =
  29. 29.56 + 53 =
  30. 30.75 + 41 =
  31. 31.22 + 21 =
  32. 32.71 + 77 =
  33. 33.65 + 26 =
  34. 34.40 + 49 =
  35. 35.28 + 51 =
  36. 36.57 + 88 =
  37. 37.24 + 29 =
  38. 38.70 + 23 =
  39. 39.53 + 14 =
  40. 40.79 + 32 =

Answer key

  1. 88
  2. 151
  3. 89
  4. 110
  5. 55
  6. 150
  7. 138
  8. 86
  9. 53
  10. 109
  11. 79
  12. 102
  13. 124
  14. 111
  15. 113
  16. 107
  17. 132
  18. 169
  19. 106
  20. 44
  21. 141
  22. 148
  23. 74
  24. 127
  25. 115
  26. 56
  27. 101
  28. 51
  29. 109
  30. 116
  31. 43
  32. 148
  33. 91
  34. 89
  35. 79
  36. 145
  37. 53
  38. 93
  39. 67
  40. 111

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