Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 848 · 40 questions

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.

1. 1.You start your homework at 4:00 and finish at 6:55. How many minutes did you work?
2. 2.Best estimate of 68 × 57? (a) 42000 (b) 4200 (c) 420
3. 3.322 − 298 =
4. 4.34 × 7 =
5. 5.Double 93 =
6. 6.220 ÷ 4 =
7. 7.16² =
8. 8.159 ÷ 3 =
9. 9.You buy a pencil box for ₹33 and pay with a ₹100 note. How much change do you get, in rupees?
10. 10.16 + 8 =
11. 11.5% of ₹150 =
12. 12.37 + ? = 100
13. 13.304 ÷ 8 =
14. 14.52 − 31 =
15. 15.58 + 71 =
16. 16.You buy a box of crayons for ₹83 and pay with a ₹100 note. How much change do you get, in rupees?
17. 17.20 + 19 =
18. 18.66 + 9 =
19. 19.13 + ? = 100
20. 20.216 ÷ 4 =
21. 21.20 + 29 =
22. 22.60 × 4 =
23. 23.Best estimate of 39 × 19? (a) 800 (b) 8000 (c) 80
24. 24.144 ÷ 6 =
25. 25.Best estimate of 37 × 92? (a) 3600 (b) 36000 (c) 360
26. 26.You buy a pencil box for ₹82 and pay with a ₹100 note. How much change do you get, in rupees?
27. 27.59 + 19 =
28. 28.8 + 7 =
29. 29.9 + 10 =
30. 30.58 − 29 =
31. 31.74 − 21 =
32. 32.74 × 4 =
33. 33.23² =
34. 34.Best estimate of 709 + 646? (a) 1300 (b) 1500 (c) 1100
35. 35.85 + 26 =
36. 36.11 + 13 =
37. 37.89 + ? = 100
38. 38.25 + 27 =
39. 39.342 ÷ 6 =
40. 40.You buy a storybook for ₹18 and pay with a ₹100 note. How much change do you get, in rupees?

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