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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 981 · 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. 1.88 + 63 =
  2. 2.76 + 44 =
  3. 3.50 + 14 =
  4. 4.57 + 23 =
  5. 5.30 + 54 =
  6. 6.21 + 84 =
  7. 7.57 + 13 =
  8. 8.45 + 76 =
  9. 9.65 + 84 =
  10. 10.40 + 17 =
  11. 11.77 + 62 =
  12. 12.22 + 76 =
  13. 13.21 + 89 =
  14. 14.44 + 45 =
  15. 15.40 + 38 =
  16. 16.58 + 75 =
  17. 17.26 + 19 =
  18. 18.80 + 32 =
  19. 19.68 + 46 =
  20. 20.84 + 22 =
  21. 21.49 + 61 =
  22. 22.61 + 21 =
  23. 23.35 + 33 =
  24. 24.22 + 49 =
  25. 25.45 + 71 =
  26. 26.23 + 61 =
  27. 27.43 + 23 =
  28. 28.47 + 63 =
  29. 29.53 + 79 =
  30. 30.32 + 85 =
  31. 31.63 + 59 =
  32. 32.53 + 21 =
  33. 33.62 + 58 =
  34. 34.75 + 41 =
  35. 35.70 + 24 =
  36. 36.60 + 14 =
  37. 37.59 + 56 =
  38. 38.84 + 43 =
  39. 39.87 + 49 =
  40. 40.89 + 21 =

Answer key

  1. 151
  2. 120
  3. 64
  4. 80
  5. 84
  6. 105
  7. 70
  8. 121
  9. 149
  10. 57
  11. 139
  12. 98
  13. 110
  14. 89
  15. 78
  16. 133
  17. 45
  18. 112
  19. 114
  20. 106
  21. 110
  22. 82
  23. 68
  24. 71
  25. 116
  26. 84
  27. 66
  28. 110
  29. 132
  30. 117
  31. 122
  32. 74
  33. 120
  34. 116
  35. 94
  36. 74
  37. 115
  38. 127
  39. 136
  40. 110

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