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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 194 · 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. 1.18 + 17 =
  2. 2.34 × 6 =
  3. 3.155 ÷ 5 =
  4. 4.14 × 4 =
  5. 5.91 − 42 =
  6. 6.80 − 15 =
  7. 7.You buy a kite for ₹43 and a pen for ₹22. You pay with a ₹100 note. How much change do you get, in rupees?
  8. 8.77 + 6 =
  9. 9.17 + 16 =
  10. 10.50% of ₹170 =
  11. 11.18 + 4 =
  12. 12.410 ÷ 5 =
  13. 13.100 ÷ 4 =
  14. 14.25² =
  15. 15.16² =
  16. 16.Best estimate of 73 × 40? (a) 280 (b) 28000 (c) 2800
  17. 17.Best estimate of 56 × 31? (a) 180 (b) 18000 (c) 1800
  18. 18.Double 26 =
  19. 19.53 × 4 =
  20. 20.23 + 57 =
  21. 21.6 + ? = 10
  22. 22.133 ÷ 7 =
  23. 23.558 ÷ 6 =
  24. 24.You start your homework at 3:30 and finish at 6:50. How many minutes did you work?
  25. 25.32 + 9 =
  26. 26.What is the remainder when 23 is divided by 4?
  27. 27.92 ÷ 4 =
  28. 28.Best estimate of 79 × 46? (a) 400 (b) 40000 (c) 4000
  29. 29.4 + ? = 10
  30. 30.Double 21 =
  31. 31.68 + 18 =
  32. 32.288 ÷ 8 =
  33. 33.235 ÷ 5 =
  34. 34.376 − 99 =
  35. 35.50 children stand in rows of 7. How many full rows can they make?
  36. 36.455 ÷ 7 =
  37. 37.75 + ? = 100
  38. 38.99 − 76 =
  39. 39.What is the remainder when 107 is divided by 7?
  40. 40.29 + 3 =

Answer key

  1. 35
  2. 204
  3. 31
  4. 56
  5. 49
  6. 65
  7. 35
  8. 83
  9. 33
  10. 85
  11. 22
  12. 82
  13. 25
  14. 625
  15. 256
  16. 2800
  17. 1800
  18. 52
  19. 212
  20. 80
  21. 4
  22. 19
  23. 93
  24. 200
  25. 41
  26. 3
  27. 23
  28. 4000
  29. 6
  30. 42
  31. 86
  32. 36
  33. 47
  34. 277
  35. 7
  36. 65
  37. 25
  38. 23
  39. 2
  40. 32

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