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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 970 · 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. 1.84 + 79 =
  2. 2.41 + 41 =
  3. 3.25 + 18 =
  4. 4.28 + 31 =
  5. 5.53 + 14 =
  6. 6.78 + 12 =
  7. 7.41 + 37 =
  8. 8.73 + 58 =
  9. 9.50 + 16 =
  10. 10.51 + 86 =
  11. 11.27 + 41 =
  12. 12.36 + 78 =
  13. 13.30 + 15 =
  14. 14.37 + 52 =
  15. 15.85 + 89 =
  16. 16.85 + 21 =
  17. 17.61 + 21 =
  18. 18.70 + 34 =
  19. 19.43 + 46 =
  20. 20.37 + 83 =
  21. 21.55 + 51 =
  22. 22.21 + 68 =
  23. 23.42 + 67 =
  24. 24.58 + 35 =
  25. 25.53 + 81 =
  26. 26.72 + 14 =
  27. 27.30 + 54 =
  28. 28.56 + 14 =
  29. 29.72 + 81 =
  30. 30.33 + 47 =
  31. 31.60 + 52 =
  32. 32.34 + 87 =
  33. 33.85 + 25 =
  34. 34.46 + 12 =
  35. 35.22 + 47 =
  36. 36.26 + 79 =
  37. 37.70 + 71 =
  38. 38.24 + 14 =
  39. 39.81 + 49 =
  40. 40.54 + 13 =

Answer key

  1. 163
  2. 82
  3. 43
  4. 59
  5. 67
  6. 90
  7. 78
  8. 131
  9. 66
  10. 137
  11. 68
  12. 114
  13. 45
  14. 89
  15. 174
  16. 106
  17. 82
  18. 104
  19. 89
  20. 120
  21. 106
  22. 89
  23. 109
  24. 93
  25. 134
  26. 86
  27. 84
  28. 70
  29. 153
  30. 80
  31. 112
  32. 121
  33. 110
  34. 58
  35. 69
  36. 105
  37. 141
  38. 38
  39. 130
  40. 67

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