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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 329 · 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. 1.25 + 8 =
  2. 2.42 − 29 =
  3. 3.176 ÷ 4 =
  4. 4.You buy a pencil box for ₹96 and pay with a ₹100 note. How much change do you get, in rupees?
  5. 5.232 ÷ 4 =
  6. 6.34 children stand in rows of 6. How many full rows can they make?
  7. 7.10 + 12 =
  8. 8.What is the remainder when 52 is divided by 6?
  9. 9.15 + 6 =
  10. 10.78 − 54 =
  11. 11.5% of ₹270 =
  12. 12.553 ÷ 7 =
  13. 13.What is the remainder when 43 is divided by 7?
  14. 14.73 + 81 =
  15. 15.51 − 42 =
  16. 16.1026 − 992 =
  17. 17.Best estimate of 34 × 57? (a) 180 (b) 18000 (c) 1800
  18. 18.93 − 29 =
  19. 19.69 + 9 =
  20. 20.27 + 84 =
  21. 21.Best estimate of 36 × 46? (a) 20000 (b) 2000 (c) 200
  22. 22.19 + 21 =
  23. 23.38 + 32 =
  24. 24.Double 49 =
  25. 25.Best estimate of 521 + 522? (a) 800 (b) 1200 (c) 1000
  26. 26.Best estimate of 282 + 487? (a) 800 (b) 1000 (c) 600
  27. 27.50% of ₹870 =
  28. 28.3 + ? = 10
  29. 29.22 + 24 =
  30. 30.46 + ? = 100
  31. 31.43 × 7 =
  32. 32.120 ÷ 8 =
  33. 33.54 × 4 =
  34. 34.390 + 99 =
  35. 35.214 − 191 =
  36. 36.66 + 9 =
  37. 37.308 − 289 =
  38. 38.12 + 13 =
  39. 39.75 + 9 =
  40. 40.508 − 488 =

Answer key

  1. 33
  2. 13
  3. 44
  4. 4
  5. 58
  6. 5
  7. 22
  8. 4
  9. 21
  10. 24
  11. 13.5
  12. 79
  13. 1
  14. 154
  15. 9
  16. 34
  17. 1800
  18. 64
  19. 78
  20. 111
  21. 2000
  22. 40
  23. 70
  24. 98
  25. 1000
  26. 800
  27. 435
  28. 7
  29. 46
  30. 54
  31. 301
  32. 15
  33. 216
  34. 489
  35. 23
  36. 75
  37. 19
  38. 25
  39. 84
  40. 20

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