Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 387 · 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. 1.9 + 4 =
2. 2.82 − 57 =
3. 3.Best estimate of 359 + 299? (a) 900 (b) 700 (c) 500
4. 4.62 × 3 =
5. 5.27 × 4 =
6. 6.67 + 19 =
7. 7.57 + 46 =
8. 8.215 − 180 =
9. 9.Best estimate of 270 + 551? (a) 1100 (b) 900 (c) 700
10. 10.You buy a bag of mangoes for ₹27 and a pen for ₹44. You pay with a ₹100 note. How much change do you get, in rupees?
11. 11.53 − 45 =
12. 12.104 − 63 =
13. 13.20 + 9 =
14. 14.You buy a notebook for ₹67 and pay with a ₹100 note. How much change do you get, in rupees?
15. 15.128 ÷ 4 =
16. 16.18 + 29 =
17. 17.51 + ? = 100
18. 18.17 × 8 =
19. 19.12 + 11 =
20. 20.54 − 22 =
21. 21.32 × 8 =
22. 22.340 ÷ 5 =
23. 23.44 + 34 =
24. 24.10% of ₹830 =
25. 25.50% of ₹280 =
26. 26.Best estimate of 56 × 76? (a) 48000 (b) 4800 (c) 480
27. 27.73 + 84 =
28. 28.68 − 29 =
29. 29.14² =
30. 30.2 + ? = 10
31. 31.Best estimate of 660 + 520? (a) 1200 (b) 1000 (c) 1400
32. 32.21 × 8 =
33. 33.5% of ₹440 =
34. 34.18 × 8 =
35. 35.84 − 60 =
36. 36.What is the remainder when 33 is divided by 5?
37. 37.You buy a kite for ₹29 and a pen for ₹29. You pay with a ₹100 note. How much change do you get, in rupees?
38. 38.5% of ₹740 =
39. 39.1029 − 977 =
40. 40.You start your homework at 2:10 and finish at 3:25. How many minutes did you work?

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