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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 90 · 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. 1.59 + 34 =
  2. 2.86 + 57 =
  3. 3.57 + 23 =
  4. 4.49 + 88 =
  5. 5.73 + 33 =
  6. 6.35 + 13 =
  7. 7.52 + 71 =
  8. 8.56 + 21 =
  9. 9.81 + 62 =
  10. 10.87 + 75 =
  11. 11.35 + 73 =
  12. 12.22 + 34 =
  13. 13.81 + 76 =
  14. 14.61 + 38 =
  15. 15.25 + 58 =
  16. 16.72 + 43 =
  17. 17.67 + 71 =
  18. 18.70 + 28 =
  19. 19.40 + 12 =
  20. 20.86 + 36 =
  21. 21.23 + 88 =
  22. 22.71 + 35 =
  23. 23.27 + 85 =
  24. 24.22 + 42 =
  25. 25.79 + 41 =
  26. 26.21 + 31 =
  27. 27.57 + 52 =
  28. 28.57 + 83 =
  29. 29.22 + 83 =
  30. 30.87 + 69 =
  31. 31.40 + 77 =
  32. 32.38 + 29 =
  33. 33.30 + 55 =
  34. 34.56 + 61 =
  35. 35.51 + 59 =
  36. 36.42 + 47 =
  37. 37.67 + 69 =
  38. 38.29 + 72 =
  39. 39.33 + 35 =
  40. 40.38 + 83 =

Answer key

  1. 93
  2. 143
  3. 80
  4. 137
  5. 106
  6. 48
  7. 123
  8. 77
  9. 143
  10. 162
  11. 108
  12. 56
  13. 157
  14. 99
  15. 83
  16. 115
  17. 138
  18. 98
  19. 52
  20. 122
  21. 111
  22. 106
  23. 112
  24. 64
  25. 120
  26. 52
  27. 109
  28. 140
  29. 105
  30. 156
  31. 117
  32. 67
  33. 85
  34. 117
  35. 110
  36. 89
  37. 136
  38. 101
  39. 68
  40. 121

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