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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 381 · 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 + 41 =
  2. 2.76 + 48 =
  3. 3.79 + 59 =
  4. 4.26 + 89 =
  5. 5.54 + 34 =
  6. 6.51 + 58 =
  7. 7.81 + 26 =
  8. 8.58 + 59 =
  9. 9.35 + 16 =
  10. 10.46 + 41 =
  11. 11.42 + 67 =
  12. 12.30 + 32 =
  13. 13.88 + 86 =
  14. 14.37 + 48 =
  15. 15.58 + 64 =
  16. 16.64 + 52 =
  17. 17.79 + 53 =
  18. 18.63 + 36 =
  19. 19.28 + 53 =
  20. 20.30 + 87 =
  21. 21.43 + 52 =
  22. 22.28 + 68 =
  23. 23.35 + 27 =
  24. 24.58 + 72 =
  25. 25.45 + 88 =
  26. 26.61 + 21 =
  27. 27.33 + 14 =
  28. 28.57 + 54 =
  29. 29.27 + 71 =
  30. 30.74 + 71 =
  31. 31.35 + 71 =
  32. 32.48 + 89 =
  33. 33.77 + 33 =
  34. 34.32 + 43 =
  35. 35.42 + 61 =
  36. 36.52 + 44 =
  37. 37.66 + 15 =
  38. 38.47 + 26 =
  39. 39.83 + 28 =
  40. 40.32 + 34 =

Answer key

  1. 120
  2. 124
  3. 138
  4. 115
  5. 88
  6. 109
  7. 107
  8. 117
  9. 51
  10. 87
  11. 109
  12. 62
  13. 174
  14. 85
  15. 122
  16. 116
  17. 132
  18. 99
  19. 81
  20. 117
  21. 95
  22. 96
  23. 62
  24. 130
  25. 133
  26. 82
  27. 47
  28. 111
  29. 98
  30. 145
  31. 106
  32. 137
  33. 110
  34. 75
  35. 103
  36. 96
  37. 81
  38. 73
  39. 111
  40. 66

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