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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 915 · 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. 1.81 + 84 =
  2. 2.81 + 36 =
  3. 3.60 + 78 =
  4. 4.61 + 18 =
  5. 5.53 + 75 =
  6. 6.64 + 75 =
  7. 7.30 + 69 =
  8. 8.57 + 31 =
  9. 9.23 + 71 =
  10. 10.48 + 28 =
  11. 11.83 + 26 =
  12. 12.81 + 71 =
  13. 13.66 + 23 =
  14. 14.80 + 28 =
  15. 15.88 + 35 =
  16. 16.81 + 33 =
  17. 17.88 + 48 =
  18. 18.35 + 74 =
  19. 19.22 + 69 =
  20. 20.41 + 65 =
  21. 21.43 + 43 =
  22. 22.32 + 42 =
  23. 23.39 + 77 =
  24. 24.75 + 44 =
  25. 25.34 + 15 =
  26. 26.52 + 81 =
  27. 27.36 + 79 =
  28. 28.26 + 19 =
  29. 29.65 + 89 =
  30. 30.35 + 41 =
  31. 31.61 + 21 =
  32. 32.52 + 61 =
  33. 33.39 + 29 =
  34. 34.50 + 56 =
  35. 35.65 + 25 =
  36. 36.84 + 45 =
  37. 37.59 + 34 =
  38. 38.32 + 21 =
  39. 39.27 + 27 =
  40. 40.40 + 72 =

Answer key

  1. 165
  2. 117
  3. 138
  4. 79
  5. 128
  6. 139
  7. 99
  8. 88
  9. 94
  10. 76
  11. 109
  12. 152
  13. 89
  14. 108
  15. 123
  16. 114
  17. 136
  18. 109
  19. 91
  20. 106
  21. 86
  22. 74
  23. 116
  24. 119
  25. 49
  26. 133
  27. 115
  28. 45
  29. 154
  30. 76
  31. 82
  32. 113
  33. 68
  34. 106
  35. 90
  36. 129
  37. 93
  38. 53
  39. 54
  40. 112

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