← Mixed mental challenge lesson New set →

Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 7 · 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. 1.33 + 41 =
  2. 2.13 × 4 =
  3. 3.50% of ₹770 =
  4. 4.60 ÷ 4 =
  5. 5.57 + 29 =
  6. 6.18 + 20 =
  7. 7.18² =
  8. 8.You buy a kite for ₹452 and pay with a ₹500 note. How much change do you get, in rupees?
  9. 9.41 + 26 =
  10. 10.A cricket match starts at 6:00 and the first innings ends at 6:30. How many minutes did the innings last?
  11. 11.175 ÷ 7 =
  12. 12.66 × 9 =
  13. 13.68 ÷ 4 =
  14. 14.96 × 9 =
  15. 15.799 + 99 =
  16. 16.12² =
  17. 17.71 − 44 =
  18. 18.5 + 8 =
  19. 19.68 × 8 =
  20. 20.33 + ? = 100
  21. 21.4 + ? = 10
  22. 22.16² =
  23. 23.77 + 14 =
  24. 24.25% of ₹90 =
  25. 25.3 + ? = 10
  26. 26.75 + 6 =
  27. 27.192 ÷ 4 =
  28. 28.103 laddoos are packed in boxes of 8. How many laddoos are left over?
  29. 29.Best estimate of 42 × 21? (a) 80 (b) 8000 (c) 800
  30. 30.26² =
  31. 31.23 × 8 =
  32. 32.52 − 21 =
  33. 33.57 + ? = 100
  34. 34.42 + 17 =
  35. 35.15² =
  36. 36.13 + 15 =
  37. 37.1008 − 981 =
  38. 38.62 × 5 =
  39. 39.Best estimate of 66 × 19? (a) 1400 (b) 14000 (c) 140
  40. 40.Best estimate of 36 × 51? (a) 200 (b) 20000 (c) 2000

Answer key

  1. 74
  2. 52
  3. 385
  4. 15
  5. 86
  6. 38
  7. 324
  8. 48
  9. 67
  10. 30
  11. 25
  12. 594
  13. 17
  14. 864
  15. 898
  16. 144
  17. 27
  18. 13
  19. 544
  20. 67
  21. 6
  22. 256
  23. 91
  24. 22.5
  25. 7
  26. 81
  27. 48
  28. 7
  29. 800
  30. 676
  31. 184
  32. 31
  33. 43
  34. 59
  35. 225
  36. 28
  37. 27
  38. 310
  39. 1400
  40. 2000

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths