← Mixed mental challenge lesson New set →

Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 677 · 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. 1.6 + 7 =
  2. 2.Double 41 =
  3. 3.Best estimate of 89 × 90? (a) 810 (b) 8100 (c) 81000
  4. 4.1020 − 980 =
  5. 5.60 + ? = 100
  6. 6.21 + 71 =
  7. 7.You buy a storybook for ₹40 and a pen for ₹34. You pay with a ₹100 note. How much change do you get, in rupees?
  8. 8.16 + 17 =
  9. 9.18 × 8 =
  10. 10.Best estimate of 28 × 38? (a) 12000 (b) 120 (c) 1200
  11. 11.19² =
  12. 12.24 − 19 =
  13. 13.120 ÷ 4 =
  14. 14.13 + 14 =
  15. 15.A cricket match starts at 2:35 and the first innings ends at 4:20. How many minutes did the innings last?
  16. 16.20 + ? = 100
  17. 17.89 + 2 =
  18. 18.13² =
  19. 19.Double 81 =
  20. 20.Double 71 =
  21. 21.48 − 29 =
  22. 22.38 + 6 =
  23. 23.364 ÷ 4 =
  24. 24.You buy a cricket ball for ₹81 and pay with a ₹100 note. How much change do you get, in rupees?
  25. 25.221 − 185 =
  26. 26.25 + 9 =
  27. 27.787 − 99 =
  28. 28.203 − 198 =
  29. 29.63 − 36 =
  30. 30.26 + 25 =
  31. 31.21² =
  32. 32.25% of ₹520 =
  33. 33.1 + ? = 10
  34. 34.232 ÷ 4 =
  35. 35.27 + 9 =
  36. 36.75 − 63 =
  37. 37.75 + 78 =
  38. 38.12 + 14 =
  39. 39.What is the remainder when 56 is divided by 9?
  40. 40.223 − 177 =

Answer key

  1. 13
  2. 82
  3. 8100
  4. 40
  5. 40
  6. 92
  7. 26
  8. 33
  9. 144
  10. 1200
  11. 361
  12. 5
  13. 30
  14. 27
  15. 105
  16. 80
  17. 91
  18. 169
  19. 162
  20. 142
  21. 19
  22. 44
  23. 91
  24. 19
  25. 36
  26. 34
  27. 688
  28. 5
  29. 27
  30. 51
  31. 441
  32. 130
  33. 9
  34. 58
  35. 36
  36. 12
  37. 153
  38. 26
  39. 2
  40. 46

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