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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 635 · 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. 1.152 ÷ 4 =
  2. 2.16² =
  3. 3.61 + ? = 100
  4. 4.Best estimate of 43 × 43? (a) 1600 (b) 16000 (c) 160
  5. 5.What is the remainder when 42 is divided by 9?
  6. 6.87 + 4 =
  7. 7.54 − 19 =
  8. 8.37 × 3 =
  9. 9.2 + ? = 10
  10. 10.Double 69 =
  11. 11.Best estimate of 564 + 769? (a) 1400 (b) 1600 (c) 1200
  12. 12.50% of ₹660 =
  13. 13.Best estimate of 455 + 326? (a) 1000 (b) 600 (c) 800
  14. 14.Double 24 =
  15. 15.Best estimate of 16 × 26? (a) 6000 (b) 600 (c) 60
  16. 16.12 + 11 =
  17. 17.308 − 293 =
  18. 18.Best estimate of 353 + 806? (a) 1400 (b) 1200 (c) 1000
  19. 19.33 + 41 =
  20. 20.23² =
  21. 21.4 + ? = 10
  22. 22.216 ÷ 4 =
  23. 23.29 + 5 =
  24. 24.Best estimate of 49 × 17? (a) 10000 (b) 1000 (c) 100
  25. 25.Best estimate of 290 + 135? (a) 600 (b) 200 (c) 400
  26. 26.7 + ? = 10
  27. 27.61 × 7 =
  28. 28.10 + 12 =
  29. 29.37 + 6 =
  30. 30.86 + 12 =
  31. 31.21 × 8 =
  32. 32.40 × 8 =
  33. 33.A film starts at 4:45 and ends at 7:45. How many minutes long is the film?
  34. 34.22 + 63 =
  35. 35.511 ÷ 7 =
  36. 36.23 × 6 =
  37. 37.5% of ₹130 =
  38. 38.25% of ₹700 =
  39. 39.319 − 278 =
  40. 40.37 + 19 =

Answer key

  1. 38
  2. 256
  3. 39
  4. 1600
  5. 6
  6. 91
  7. 35
  8. 111
  9. 8
  10. 138
  11. 1400
  12. 330
  13. 800
  14. 48
  15. 600
  16. 23
  17. 15
  18. 1200
  19. 74
  20. 529
  21. 6
  22. 54
  23. 34
  24. 1000
  25. 400
  26. 3
  27. 427
  28. 22
  29. 43
  30. 98
  31. 168
  32. 320
  33. 180
  34. 85
  35. 73
  36. 138
  37. 6.5
  38. 175
  39. 41
  40. 56

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