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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 78 · 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. 1.31 + 88 =
  2. 2.28 + 34 =
  3. 3.73 + 87 =
  4. 4.22 + 42 =
  5. 5.55 + 85 =
  6. 6.24 + 64 =
  7. 7.27 + 54 =
  8. 8.63 + 19 =
  9. 9.31 + 25 =
  10. 10.58 + 13 =
  11. 11.35 + 19 =
  12. 12.76 + 25 =
  13. 13.54 + 26 =
  14. 14.45 + 73 =
  15. 15.31 + 84 =
  16. 16.33 + 19 =
  17. 17.80 + 14 =
  18. 18.22 + 61 =
  19. 19.78 + 42 =
  20. 20.42 + 37 =
  21. 21.47 + 79 =
  22. 22.30 + 31 =
  23. 23.75 + 53 =
  24. 24.25 + 23 =
  25. 25.49 + 51 =
  26. 26.24 + 63 =
  27. 27.43 + 51 =
  28. 28.25 + 13 =
  29. 29.52 + 61 =
  30. 30.51 + 24 =
  31. 31.87 + 69 =
  32. 32.85 + 47 =
  33. 33.67 + 51 =
  34. 34.56 + 18 =
  35. 35.35 + 69 =
  36. 36.48 + 34 =
  37. 37.73 + 26 =
  38. 38.73 + 57 =
  39. 39.35 + 45 =
  40. 40.87 + 23 =

Answer key

  1. 119
  2. 62
  3. 160
  4. 64
  5. 140
  6. 88
  7. 81
  8. 82
  9. 56
  10. 71
  11. 54
  12. 101
  13. 80
  14. 118
  15. 115
  16. 52
  17. 94
  18. 83
  19. 120
  20. 79
  21. 126
  22. 61
  23. 128
  24. 48
  25. 100
  26. 87
  27. 94
  28. 38
  29. 113
  30. 75
  31. 156
  32. 132
  33. 118
  34. 74
  35. 104
  36. 82
  37. 99
  38. 130
  39. 80
  40. 110

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