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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 74 · 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. 1.50% of ₹110 =
  2. 2.25% of ₹370 =
  3. 3.232 ÷ 8 =
  4. 4.19 × 9 =
  5. 5.256 ÷ 8 =
  6. 6.254 + 99 =
  7. 7.329 − 99 =
  8. 8.49 + 2 =
  9. 9.71 × 4 =
  10. 10.31 × 8 =
  11. 11.81 − 19 =
  12. 12.25% of ₹450 =
  13. 13.609 − 99 =
  14. 14.160 ÷ 4 =
  15. 15.76 + ? = 100
  16. 16.1026 − 975 =
  17. 17.Double 43 =
  18. 18.26 + 27 =
  19. 19.Best estimate of 52 × 82? (a) 4000 (b) 400 (c) 40000
  20. 20.A cricket match starts at 8:05 and the first innings ends at 9:45. How many minutes did the innings last?
  21. 21.519 − 496 =
  22. 22.25 × 3 =
  23. 23.33 × 8 =
  24. 24.Best estimate of 828 + 777? (a) 1600 (b) 1800 (c) 1400
  25. 25.52 + 19 =
  26. 26.38 + ? = 100
  27. 27.24 + 25 =
  28. 28.14 + 13 =
  29. 29.6 + ? = 10
  30. 30.72 − 18 =
  31. 31.19 × 8 =
  32. 32.A cricket match starts at 3:00 and the first innings ends at 3:25. How many minutes did the innings last?
  33. 33.58 + 64 =
  34. 34.5% of ₹70 =
  35. 35.You buy a box of crayons for ₹40 and a pen for ₹12. You pay with a ₹100 note. How much change do you get, in rupees?
  36. 36.Double 97 =
  37. 37.105 ÷ 7 =
  38. 38.14 + 15 =
  39. 39.16 + 15 =
  40. 40.78 − 41 =

Answer key

  1. 55
  2. 92.5
  3. 29
  4. 171
  5. 32
  6. 353
  7. 230
  8. 51
  9. 284
  10. 248
  11. 62
  12. 112.5
  13. 510
  14. 40
  15. 24
  16. 51
  17. 86
  18. 53
  19. 4000
  20. 100
  21. 23
  22. 75
  23. 264
  24. 1600
  25. 71
  26. 62
  27. 49
  28. 27
  29. 4
  30. 54
  31. 152
  32. 25
  33. 122
  34. 3.5
  35. 48
  36. 194
  37. 15
  38. 29
  39. 31
  40. 37

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