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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 765 · 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. 1.40 × 4 =
  2. 2.Best estimate of 297 + 575? (a) 900 (b) 700 (c) 1100
  3. 3.13² =
  4. 4.You buy a cricket ball for ₹383 and pay with a ₹500 note. How much change do you get, in rupees?
  5. 5.88 + ? = 100
  6. 6.232 ÷ 8 =
  7. 7.You buy a kite for ₹35 and pay with a ₹100 note. How much change do you get, in rupees?
  8. 8.14 + 15 =
  9. 9.You buy a storybook for ₹26 and pay with a ₹100 note. How much change do you get, in rupees?
  10. 10.71 + 47 =
  11. 11.64 + 59 =
  12. 12.50% of ₹210 =
  13. 13.28 + 6 =
  14. 14.93 − 77 =
  15. 15.69 − 59 =
  16. 16.85 − 45 =
  17. 17.10% of ₹650 =
  18. 18.31 children stand in rows of 4. How many full rows can they make?
  19. 19.12² =
  20. 20.17 + 9 =
  21. 21.Best estimate of 293 + 235? (a) 700 (b) 300 (c) 500
  22. 22.72 − 32 =
  23. 23.You buy a kite for ₹343 and pay with a ₹500 note. How much change do you get, in rupees?
  24. 24.101 − 78 =
  25. 25.You start your homework at 1:45 and finish at 3:35. How many minutes did you work?
  26. 26.68 + 51 =
  27. 27.25% of ₹250 =
  28. 28.88 + 75 =
  29. 29.You buy a water bottle for ₹77 and pay with a ₹100 note. How much change do you get, in rupees?
  30. 30.You buy a storybook for ₹80 and pay with a ₹100 note. How much change do you get, in rupees?
  31. 31.31 laddoos are packed in boxes of 4. How many laddoos are left over?
  32. 32.51 laddoos are packed in boxes of 4. How many laddoos are left over?
  33. 33.Best estimate of 34 × 29? (a) 900 (b) 9000 (c) 90
  34. 34.94 − 49 =
  35. 35.Best estimate of 738 + 793? (a) 1700 (b) 1300 (c) 1500
  36. 36.140 ÷ 4 =
  37. 37.75 − 43 =
  38. 38.28 + 4 =
  39. 39.21² =
  40. 40.56 + 9 =

Answer key

  1. 160
  2. 900
  3. 169
  4. 117
  5. 12
  6. 29
  7. 65
  8. 29
  9. 74
  10. 118
  11. 123
  12. 105
  13. 34
  14. 16
  15. 10
  16. 40
  17. 65
  18. 7
  19. 144
  20. 26
  21. 500
  22. 40
  23. 157
  24. 23
  25. 110
  26. 119
  27. 62.5
  28. 163
  29. 23
  30. 20
  31. 3
  32. 3
  33. 900
  34. 45
  35. 1500
  36. 35
  37. 32
  38. 32
  39. 441
  40. 65

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