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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 141 · 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. 1.42 + 76 =
  2. 2.71 + 64 =
  3. 3.85 + 22 =
  4. 4.28 + 61 =
  5. 5.47 + 21 =
  6. 6.50 + 39 =
  7. 7.80 + 15 =
  8. 8.25 + 51 =
  9. 9.45 + 61 =
  10. 10.77 + 88 =
  11. 11.21 + 38 =
  12. 12.50 + 28 =
  13. 13.87 + 28 =
  14. 14.23 + 61 =
  15. 15.68 + 18 =
  16. 16.38 + 36 =
  17. 17.53 + 25 =
  18. 18.26 + 31 =
  19. 19.41 + 17 =
  20. 20.59 + 38 =
  21. 21.30 + 29 =
  22. 22.69 + 57 =
  23. 23.44 + 84 =
  24. 24.46 + 63 =
  25. 25.47 + 18 =
  26. 26.54 + 45 =
  27. 27.64 + 86 =
  28. 28.27 + 15 =
  29. 29.61 + 12 =
  30. 30.30 + 33 =
  31. 31.39 + 45 =
  32. 32.85 + 53 =
  33. 33.31 + 34 =
  34. 34.33 + 84 =
  35. 35.34 + 68 =
  36. 36.67 + 24 =
  37. 37.21 + 51 =
  38. 38.48 + 63 =
  39. 39.67 + 77 =
  40. 40.25 + 14 =

Answer key

  1. 118
  2. 135
  3. 107
  4. 89
  5. 68
  6. 89
  7. 95
  8. 76
  9. 106
  10. 165
  11. 59
  12. 78
  13. 115
  14. 84
  15. 86
  16. 74
  17. 78
  18. 57
  19. 58
  20. 97
  21. 59
  22. 126
  23. 128
  24. 109
  25. 65
  26. 99
  27. 150
  28. 42
  29. 73
  30. 63
  31. 84
  32. 138
  33. 65
  34. 117
  35. 102
  36. 91
  37. 72
  38. 111
  39. 144
  40. 39

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