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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 214 · 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. 1.79 + 66 =
  2. 2.80 + 77 =
  3. 3.37 + 87 =
  4. 4.79 + 76 =
  5. 5.33 + 24 =
  6. 6.50 + 77 =
  7. 7.60 + 29 =
  8. 8.31 + 71 =
  9. 9.38 + 81 =
  10. 10.65 + 62 =
  11. 11.65 + 38 =
  12. 12.56 + 77 =
  13. 13.53 + 24 =
  14. 14.57 + 21 =
  15. 15.60 + 84 =
  16. 16.61 + 44 =
  17. 17.30 + 31 =
  18. 18.22 + 34 =
  19. 19.53 + 77 =
  20. 20.21 + 31 =
  21. 21.44 + 52 =
  22. 22.34 + 41 =
  23. 23.23 + 56 =
  24. 24.73 + 31 =
  25. 25.86 + 34 =
  26. 26.24 + 23 =
  27. 27.84 + 51 =
  28. 28.72 + 85 =
  29. 29.27 + 31 =
  30. 30.61 + 32 =
  31. 31.21 + 85 =
  32. 32.34 + 81 =
  33. 33.33 + 39 =
  34. 34.40 + 14 =
  35. 35.23 + 72 =
  36. 36.72 + 77 =
  37. 37.44 + 33 =
  38. 38.83 + 31 =
  39. 39.38 + 24 =
  40. 40.30 + 46 =

Answer key

  1. 145
  2. 157
  3. 124
  4. 155
  5. 57
  6. 127
  7. 89
  8. 102
  9. 119
  10. 127
  11. 103
  12. 133
  13. 77
  14. 78
  15. 144
  16. 105
  17. 61
  18. 56
  19. 130
  20. 52
  21. 96
  22. 75
  23. 79
  24. 104
  25. 120
  26. 47
  27. 135
  28. 157
  29. 58
  30. 93
  31. 106
  32. 115
  33. 72
  34. 54
  35. 95
  36. 149
  37. 77
  38. 114
  39. 62
  40. 76

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