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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 150 · 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. 1.21 + 61 =
  2. 2.57 + 69 =
  3. 3.21 + 22 =
  4. 4.35 + 75 =
  5. 5.30 + 81 =
  6. 6.30 + 12 =
  7. 7.45 + 48 =
  8. 8.81 + 82 =
  9. 9.58 + 58 =
  10. 10.84 + 21 =
  11. 11.63 + 78 =
  12. 12.49 + 62 =
  13. 13.80 + 83 =
  14. 14.40 + 31 =
  15. 15.32 + 39 =
  16. 16.38 + 12 =
  17. 17.68 + 58 =
  18. 18.81 + 84 =
  19. 19.49 + 47 =
  20. 20.48 + 51 =
  21. 21.47 + 77 =
  22. 22.30 + 55 =
  23. 23.63 + 63 =
  24. 24.39 + 76 =
  25. 25.25 + 24 =
  26. 26.54 + 76 =
  27. 27.53 + 44 =
  28. 28.42 + 25 =
  29. 29.67 + 46 =
  30. 30.23 + 36 =
  31. 31.57 + 85 =
  32. 32.47 + 46 =
  33. 33.34 + 22 =
  34. 34.32 + 85 =
  35. 35.32 + 87 =
  36. 36.50 + 59 =
  37. 37.37 + 12 =
  38. 38.84 + 15 =
  39. 39.34 + 43 =
  40. 40.40 + 34 =

Answer key

  1. 82
  2. 126
  3. 43
  4. 110
  5. 111
  6. 42
  7. 93
  8. 163
  9. 116
  10. 105
  11. 141
  12. 111
  13. 163
  14. 71
  15. 71
  16. 50
  17. 126
  18. 165
  19. 96
  20. 99
  21. 124
  22. 85
  23. 126
  24. 115
  25. 49
  26. 130
  27. 97
  28. 67
  29. 113
  30. 59
  31. 142
  32. 93
  33. 56
  34. 117
  35. 119
  36. 109
  37. 49
  38. 99
  39. 77
  40. 74

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