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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 490 · 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 + 42 =
  2. 2.22 + 23 =
  3. 3.54 + 63 =
  4. 4.50 + 72 =
  5. 5.63 + 28 =
  6. 6.88 + 69 =
  7. 7.86 + 47 =
  8. 8.55 + 53 =
  9. 9.29 + 29 =
  10. 10.67 + 33 =
  11. 11.27 + 55 =
  12. 12.59 + 55 =
  13. 13.41 + 47 =
  14. 14.81 + 35 =
  15. 15.72 + 75 =
  16. 16.62 + 27 =
  17. 17.29 + 85 =
  18. 18.59 + 18 =
  19. 19.47 + 52 =
  20. 20.38 + 29 =
  21. 21.75 + 33 =
  22. 22.75 + 85 =
  23. 23.69 + 56 =
  24. 24.55 + 35 =
  25. 25.22 + 29 =
  26. 26.44 + 18 =
  27. 27.44 + 15 =
  28. 28.22 + 12 =
  29. 29.27 + 28 =
  30. 30.55 + 21 =
  31. 31.49 + 59 =
  32. 32.57 + 87 =
  33. 33.58 + 31 =
  34. 34.58 + 37 =
  35. 35.65 + 84 =
  36. 36.54 + 44 =
  37. 37.40 + 47 =
  38. 38.42 + 83 =
  39. 39.65 + 61 =
  40. 40.58 + 16 =

Answer key

  1. 101
  2. 45
  3. 117
  4. 122
  5. 91
  6. 157
  7. 133
  8. 108
  9. 58
  10. 100
  11. 82
  12. 114
  13. 88
  14. 116
  15. 147
  16. 89
  17. 114
  18. 77
  19. 99
  20. 67
  21. 108
  22. 160
  23. 125
  24. 90
  25. 51
  26. 62
  27. 59
  28. 34
  29. 55
  30. 76
  31. 108
  32. 144
  33. 89
  34. 95
  35. 149
  36. 98
  37. 87
  38. 125
  39. 126
  40. 74

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