← Mixed mental challenge lesson New set →

Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 489 · 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. 1.23 + 56 =
  2. 2.Half of 128 =
  3. 3.578 − 99 =
  4. 4.Double 52 =
  5. 5.301 ÷ 7 =
  6. 6.15² =
  7. 7.46 + 9 =
  8. 8.58 + 29 =
  9. 9.20 × 4 =
  10. 10.29 + 9 =
  11. 11.33 + 49 =
  12. 12.16 + 15 =
  13. 13.14 × 7 =
  14. 14.168 ÷ 4 =
  15. 15.58 + 78 =
  16. 16.Half of 168 =
  17. 17.27 × 3 =
  18. 18.11² =
  19. 19.70 + 56 =
  20. 20.50 + 36 =
  21. 21.96 × 5 =
  22. 22.510 − 494 =
  23. 23.35 × 8 =
  24. 24.41 + ? = 100
  25. 25.Best estimate of 48 × 58? (a) 30000 (b) 3000 (c) 300
  26. 26.34 + 9 =
  27. 27.27 + ? = 100
  28. 28.125 ÷ 5 =
  29. 29.A film starts at 1:00 and ends at 1:30. How many minutes long is the film?
  30. 30.13 + 12 =
  31. 31.Best estimate of 16 × 60? (a) 1200 (b) 120 (c) 12000
  32. 32.34 × 7 =
  33. 33.98 − 48 =
  34. 34.35 laddoos are packed in boxes of 8. How many laddoos are left over?
  35. 35.323 − 282 =
  36. 36.12 × 8 =
  37. 37.222 − 194 =
  38. 38.You buy a bag of mangoes for ₹149 and pay with a ₹500 note. How much change do you get, in rupees?
  39. 39.7 + 6 =
  40. 40.8 + 8 =

Answer key

  1. 79
  2. 64
  3. 479
  4. 104
  5. 43
  6. 225
  7. 55
  8. 87
  9. 80
  10. 38
  11. 82
  12. 31
  13. 98
  14. 42
  15. 136
  16. 84
  17. 81
  18. 121
  19. 126
  20. 86
  21. 480
  22. 16
  23. 280
  24. 59
  25. 3000
  26. 43
  27. 73
  28. 25
  29. 30
  30. 25
  31. 1200
  32. 238
  33. 50
  34. 3
  35. 41
  36. 96
  37. 28
  38. 351
  39. 13
  40. 16

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths