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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 783 · 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 + 81 =
  2. 2.61 + 57 =
  3. 3.53 + 32 =
  4. 4.83 + 79 =
  5. 5.41 + 71 =
  6. 6.34 + 13 =
  7. 7.84 + 14 =
  8. 8.60 + 47 =
  9. 9.87 + 63 =
  10. 10.21 + 55 =
  11. 11.71 + 68 =
  12. 12.23 + 34 =
  13. 13.36 + 74 =
  14. 14.33 + 24 =
  15. 15.36 + 73 =
  16. 16.67 + 64 =
  17. 17.87 + 64 =
  18. 18.29 + 72 =
  19. 19.43 + 81 =
  20. 20.57 + 19 =
  21. 21.80 + 31 =
  22. 22.70 + 51 =
  23. 23.86 + 25 =
  24. 24.38 + 14 =
  25. 25.86 + 41 =
  26. 26.49 + 65 =
  27. 27.24 + 19 =
  28. 28.70 + 89 =
  29. 29.36 + 56 =
  30. 30.87 + 54 =
  31. 31.31 + 81 =
  32. 32.24 + 44 =
  33. 33.66 + 19 =
  34. 34.37 + 54 =
  35. 35.63 + 44 =
  36. 36.50 + 76 =
  37. 37.30 + 84 =
  38. 38.59 + 76 =
  39. 39.29 + 66 =
  40. 40.27 + 51 =

Answer key

  1. 146
  2. 118
  3. 85
  4. 162
  5. 112
  6. 47
  7. 98
  8. 107
  9. 150
  10. 76
  11. 139
  12. 57
  13. 110
  14. 57
  15. 109
  16. 131
  17. 151
  18. 101
  19. 124
  20. 76
  21. 111
  22. 121
  23. 111
  24. 52
  25. 127
  26. 114
  27. 43
  28. 159
  29. 92
  30. 141
  31. 112
  32. 68
  33. 85
  34. 91
  35. 107
  36. 126
  37. 114
  38. 135
  39. 95
  40. 78

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