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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 40 · 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. 1.214 − 197 =
  2. 2.Best estimate of 66 × 31? (a) 210 (b) 21000 (c) 2100
  3. 3.99 × 9 =
  4. 4.92 − 29 =
  5. 5.8 + 7 =
  6. 6.Best estimate of 41 × 38? (a) 16000 (b) 160 (c) 1600
  7. 7.54 × 3 =
  8. 8.87 − 17 =
  9. 9.64 ÷ 4 =
  10. 10.64 × 4 =
  11. 11.Half of 114 =
  12. 12.91 − 55 =
  13. 13.You buy a box of crayons for ₹236 and pay with a ₹500 note. How much change do you get, in rupees?
  14. 14.59 − 19 =
  15. 15.144 ÷ 4 =
  16. 16.Double 83 =
  17. 17.113 − 92 =
  18. 18.18 × 8 =
  19. 19.288 ÷ 8 =
  20. 20.29 × 4 =
  21. 21.What is the remainder when 17 is divided by 4?
  22. 22.19² =
  23. 23.56 + 5 =
  24. 24.Best estimate of 339 + 240? (a) 500 (b) 700 (c) 300
  25. 25.619 − 99 =
  26. 26.68 × 9 =
  27. 27.11² =
  28. 28.What is the remainder when 40 is divided by 6?
  29. 29.50% of ₹550 =
  30. 30.52 − 29 =
  31. 31.88 ÷ 4 =
  32. 32.81 − 24 =
  33. 33.53 laddoos are packed in boxes of 6. How many laddoos are left over?
  34. 34.You buy a kite for ₹272 and pay with a ₹500 note. How much change do you get, in rupees?
  35. 35.14² =
  36. 36.61 × 4 =
  37. 37.52 − 17 =
  38. 38.83 + 67 =
  39. 39.69 − 44 =
  40. 40.70 + 83 =

Answer key

  1. 17
  2. 2100
  3. 891
  4. 63
  5. 15
  6. 1600
  7. 162
  8. 70
  9. 16
  10. 256
  11. 57
  12. 36
  13. 264
  14. 40
  15. 36
  16. 166
  17. 21
  18. 144
  19. 36
  20. 116
  21. 1
  22. 361
  23. 61
  24. 500
  25. 520
  26. 612
  27. 121
  28. 4
  29. 275
  30. 23
  31. 22
  32. 57
  33. 5
  34. 228
  35. 196
  36. 244
  37. 35
  38. 150
  39. 25
  40. 153

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