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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 416 · 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. 1.136 ÷ 4 =
  2. 2.68 − 34 =
  3. 3.66 + 19 =
  4. 4.26 × 4 =
  5. 5.19 × 9 =
  6. 6.Best estimate of 16 × 47? (a) 1000 (b) 10000 (c) 100
  7. 7.Best estimate of 64 × 42? (a) 2400 (b) 240 (c) 24000
  8. 8.You buy a cricket ball for ₹29 and pay with a ₹100 note. How much change do you get, in rupees?
  9. 9.Double 42 =
  10. 10.53 × 4 =
  11. 11.25 + 7 =
  12. 12.27 + 6 =
  13. 13.Best estimate of 86 × 94? (a) 8100 (b) 81000 (c) 810
  14. 14.17 × 8 =
  15. 15.182 ÷ 7 =
  16. 16.574 ÷ 7 =
  17. 17.24 × 6 =
  18. 18.6 + 7 =
  19. 19.252 ÷ 9 =
  20. 20.53 + ? = 100
  21. 21.75 children stand in rows of 9. How many full rows can they make?
  22. 22.25 × 5 =
  23. 23.84 + 18 =
  24. 24.99 × 7 =
  25. 25.7 + 6 =
  26. 26.27 + 4 =
  27. 27.26² =
  28. 28.54 + ? = 100
  29. 29.28² =
  30. 30.64 − 35 =
  31. 31.13² =
  32. 32.78 + 55 =
  33. 33.Double 99 =
  34. 34.18² =
  35. 35.A cricket match starts at 3:35 and the first innings ends at 6:40. How many minutes did the innings last?
  36. 36.85 ÷ 5 =
  37. 37.64 × 3 =
  38. 38.29 + 5 =
  39. 39.38 × 4 =
  40. 40.15 + 6 =

Answer key

  1. 34
  2. 34
  3. 85
  4. 104
  5. 171
  6. 1000
  7. 2400
  8. 71
  9. 84
  10. 212
  11. 32
  12. 33
  13. 8100
  14. 136
  15. 26
  16. 82
  17. 144
  18. 13
  19. 28
  20. 47
  21. 8
  22. 125
  23. 102
  24. 693
  25. 13
  26. 31
  27. 676
  28. 46
  29. 784
  30. 29
  31. 169
  32. 133
  33. 198
  34. 324
  35. 185
  36. 17
  37. 192
  38. 34
  39. 152
  40. 21

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