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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 600 · 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. 1.19 × 8 =
  2. 2.63 × 4 =
  3. 3.You buy a kite for ₹36 and pay with a ₹100 note. How much change do you get, in rupees?
  4. 4.129 − 95 =
  5. 5.10 + 11 =
  6. 6.12 − 9 =
  7. 7.224 ÷ 4 =
  8. 8.9 + 7 =
  9. 9.Double 71 =
  10. 10.26 children stand in rows of 5. How many full rows can they make?
  11. 11.You buy a box of crayons for ₹17 and pay with a ₹100 note. How much change do you get, in rupees?
  12. 12.1026 − 986 =
  13. 13.19 + 9 =
  14. 14.56 + 75 =
  15. 15.226 − 196 =
  16. 16.7 + 6 =
  17. 17.49 + 2 =
  18. 18.75 × 7 =
  19. 19.19 + 20 =
  20. 20.6 + ? = 10
  21. 21.97 × 5 =
  22. 22.19 × 7 =
  23. 23.Best estimate of 18 × 83? (a) 1600 (b) 160 (c) 16000
  24. 24.52 − 34 =
  25. 25.18 + 9 =
  26. 26.Double 38 =
  27. 27.80 ÷ 4 =
  28. 28.Double 92 =
  29. 29.78 + 84 =
  30. 30.10% of ₹630 =
  31. 31.679 ÷ 7 =
  32. 32.Best estimate of 243 + 619? (a) 800 (b) 1000 (c) 600
  33. 33.507 − 497 =
  34. 34.18 × 6 =
  35. 35.92 − 21 =
  36. 36.14² =
  37. 37.24 × 8 =
  38. 38.17 + 9 =
  39. 39.Best estimate of 147 + 320? (a) 400 (b) 200 (c) 600
  40. 40.44 + 71 =

Answer key

  1. 152
  2. 252
  3. 64
  4. 34
  5. 21
  6. 3
  7. 56
  8. 16
  9. 142
  10. 5
  11. 83
  12. 40
  13. 28
  14. 131
  15. 30
  16. 13
  17. 51
  18. 525
  19. 39
  20. 4
  21. 485
  22. 133
  23. 1600
  24. 18
  25. 27
  26. 76
  27. 20
  28. 184
  29. 162
  30. 63
  31. 97
  32. 800
  33. 10
  34. 108
  35. 71
  36. 196
  37. 192
  38. 26
  39. 400
  40. 115

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