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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 680 · 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.A film starts at 7:10 and ends at 10:05. How many minutes long is the film?
  2. 2.61 − 18 =
  3. 3.A cricket match starts at 6:15 and the first innings ends at 9:20. How many minutes did the innings last?
  4. 4.272 ÷ 8 =
  5. 5.Best estimate of 234 + 763? (a) 1000 (b) 800 (c) 1200
  6. 6.14 + ? = 100
  7. 7.15² =
  8. 8.Best estimate of 33 × 39? (a) 12000 (b) 1200 (c) 120
  9. 9.76 + 8 =
  10. 10.74 laddoos are packed in boxes of 9. How many laddoos are left over?
  11. 11.Best estimate of 79 × 34? (a) 240 (b) 24000 (c) 2400
  12. 12.47 + 17 =
  13. 13.Best estimate of 33 × 26? (a) 900 (b) 9000 (c) 90
  14. 14.What is the remainder when 43 is divided by 3?
  15. 15.Best estimate of 51 × 86? (a) 450 (b) 45000 (c) 4500
  16. 16.You buy a kite for ₹38 and a pen for ₹17. You pay with a ₹100 note. How much change do you get, in rupees?
  17. 17.Best estimate of 137 + 636? (a) 700 (b) 500 (c) 900
  18. 18.23 − 19 =
  19. 19.You buy a kite for ₹23 and pay with a ₹100 note. How much change do you get, in rupees?
  20. 20.1 + ? = 10
  21. 21.82 + ? = 100
  22. 22.210 ÷ 6 =
  23. 23.68 − 29 =
  24. 24.Double 67 =
  25. 25.85 − 21 =
  26. 26.37 × 3 =
  27. 27.67 − 14 =
  28. 28.A cricket match starts at 6:40 and the first innings ends at 8:15. How many minutes did the innings last?
  29. 29.What is the remainder when 57 is divided by 8?
  30. 30.Best estimate of 77 × 86? (a) 720 (b) 7200 (c) 72000
  31. 31.Best estimate of 190 + 654? (a) 900 (b) 700 (c) 1100
  32. 32.26 + 8 =
  33. 33.52 + 12 =
  34. 34.Double 93 =
  35. 35.What is the remainder when 31 is divided by 5?
  36. 36.12 + 11 =
  37. 37.60 + 19 =
  38. 38.A train leaves at 2:35 and reaches the next city at 4:35. How many minutes is the journey?
  39. 39.50% of ₹230 =
  40. 40.125 − 90 =

Answer key

  1. 175
  2. 43
  3. 185
  4. 34
  5. 1000
  6. 86
  7. 225
  8. 1200
  9. 84
  10. 2
  11. 2400
  12. 64
  13. 900
  14. 1
  15. 4500
  16. 45
  17. 700
  18. 4
  19. 77
  20. 9
  21. 18
  22. 35
  23. 39
  24. 134
  25. 64
  26. 111
  27. 53
  28. 95
  29. 1
  30. 7200
  31. 900
  32. 34
  33. 64
  34. 186
  35. 1
  36. 23
  37. 79
  38. 120
  39. 115
  40. 35

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