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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 258 · 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. 1.72 − 13 =
  2. 2.33 × 8 =
  3. 3.15 + 17 =
  4. 4.423 ÷ 9 =
  5. 5.Best estimate of 72 × 23? (a) 140 (b) 1400 (c) 14000
  6. 6.8 + 9 =
  7. 7.79 × 9 =
  8. 8.27 + 5 =
  9. 9.23 × 8 =
  10. 10.10% of ₹770 =
  11. 11.14 + 16 =
  12. 12.86 + 38 =
  13. 13.36 × 8 =
  14. 14.Double 51 =
  15. 15.258 ÷ 3 =
  16. 16.96 ÷ 8 =
  17. 17.1 + ? = 10
  18. 18.94 − 76 =
  19. 19.13 + 29 =
  20. 20.117 ÷ 3 =
  21. 21.You buy a kite for ₹42 and a pen for ₹26. You pay with a ₹100 note. How much change do you get, in rupees?
  22. 22.3 + ? = 10
  23. 23.75 + 18 =
  24. 24.86 + 8 =
  25. 25.39 × 5 =
  26. 26.28 + 7 =
  27. 27.82 × 7 =
  28. 28.You buy a water bottle for ₹44 and a pen for ₹26. You pay with a ₹100 note. How much change do you get, in rupees?
  29. 29.65 + 29 =
  30. 30.59 children stand in rows of 4. How many full rows can they make?
  31. 31.Best estimate of 18 × 66? (a) 1400 (b) 140 (c) 14000
  32. 32.25² =
  33. 33.Best estimate of 18 × 69? (a) 14000 (b) 140 (c) 1400
  34. 34.28² =
  35. 35.79 + ? = 100
  36. 36.45 × 4 =
  37. 37.14 + 13 =
  38. 38.435 ÷ 5 =
  39. 39.What is the remainder when 111 is divided by 7?
  40. 40.27² =

Answer key

  1. 59
  2. 264
  3. 32
  4. 47
  5. 1400
  6. 17
  7. 711
  8. 32
  9. 184
  10. 77
  11. 30
  12. 124
  13. 288
  14. 102
  15. 86
  16. 12
  17. 9
  18. 18
  19. 42
  20. 39
  21. 32
  22. 7
  23. 93
  24. 94
  25. 195
  26. 35
  27. 574
  28. 30
  29. 94
  30. 14
  31. 1400
  32. 625
  33. 1400
  34. 784
  35. 21
  36. 180
  37. 27
  38. 87
  39. 6
  40. 729

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