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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 845 · 40 questions
TalentJR

How to do it in your head (Look first): A 9, 19 or 99 → round and adjust. Two close numbers → count up (or near doubles when adding). × or ÷ by 4 or 8 → double or halve; other sums → split into tens and ones.

NameDateTime takenScore ___ / 40
  1. 1.87 + 4 =
  2. 2.9 + 10 =
  3. 3.9 + ? = 10
  4. 4.11² =
  5. 5.34 + 9 =
  6. 6.180 ÷ 4 =
  7. 7.320 ÷ 8 =
  8. 8.Best estimate of 67 × 62? (a) 420 (b) 4200 (c) 42000
  9. 9.515 − 489 =
  10. 10.You buy a bag of mangoes for ₹14 and a pen for ₹17. You pay with a ₹100 note. How much change do you get, in rupees?
  11. 11.73 × 5 =
  12. 12.40 × 4 =
  13. 13.6 + 5 =
  14. 14.69 + 8 =
  15. 15.59 children stand in rows of 4. How many full rows can they make?
  16. 16.87 × 5 =
  17. 17.9 + 11 =
  18. 18.You start your homework at 8:55 and finish at 9:20. How many minutes did you work?
  19. 19.86 × 6 =
  20. 20.82 − 72 =
  21. 21.22 × 8 =
  22. 22.387 ÷ 9 =
  23. 23.22 + 23 =
  24. 24.25% of ₹540 =
  25. 25.49 + ? = 100
  26. 26.Double 65 =
  27. 27.50% of ₹710 =
  28. 28.208 ÷ 4 =
  29. 29.23 + 19 =
  30. 30.52 − 19 =
  31. 31.58 − 19 =
  32. 32.380 ÷ 4 =
  33. 33.1024 − 996 =
  34. 34.91 − 64 =
  35. 35.A train leaves at 1:50 and reaches the next city at 2:15. How many minutes is the journey?
  36. 36.You start your homework at 5:55 and finish at 6:20. How many minutes did you work?
  37. 37.5% of ₹350 =
  38. 38.You buy a water bottle for ₹53 and pay with a ₹100 note. How much change do you get, in rupees?
  39. 39.65 + 7 =
  40. 40.28 + 30 =

Answer key

  1. 91
  2. 19
  3. 1
  4. 121
  5. 43
  6. 45
  7. 40
  8. 4200
  9. 26
  10. 69
  11. 365
  12. 160
  13. 11
  14. 77
  15. 14
  16. 435
  17. 20
  18. 25
  19. 516
  20. 10
  21. 176
  22. 43
  23. 45
  24. 135
  25. 51
  26. 130
  27. 355
  28. 52
  29. 42
  30. 33
  31. 39
  32. 95
  33. 28
  34. 27
  35. 25
  36. 25
  37. 17.5
  38. 47
  39. 72
  40. 58

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