Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 754 · 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. 1.72 ÷ 4 =
2. 2.29 × 4 =
3. 3.46 + 7 =
4. 4.21² =
5. 5.51 − 27 =
6. 6.29 + 5 =
7. 7.38 + 83 =
8. 8.Best estimate of 840 + 759? (a) 1400 (b) 1600 (c) 1800
9. 9.240 ÷ 8 =
10. 10.You buy a box of crayons for ₹28 and pay with a ₹100 note. How much change do you get, in rupees?
11. 11.272 ÷ 8 =
12. 12.2 + ? = 10
13. 13.24 + 19 =
14. 14.12 + 19 =
15. 15.Best estimate of 87 × 26? (a) 270 (b) 2700 (c) 27000
16. 16.Double 48 =
17. 17.13 × 8 =
18. 18.You buy a kite for ₹402 and pay with a ₹500 note. How much change do you get, in rupees?
19. 19.Best estimate of 855 + 596? (a) 1300 (b) 1500 (c) 1700
20. 20.Best estimate of 13 × 37? (a) 400 (b) 4000 (c) 40
21. 21.10% of ₹750 =
22. 22.76 − 52 =
23. 23.1001 − 995 =
24. 24.Half of 60 =
25. 25.23 × 5 =
26. 26.Best estimate of 228 + 832? (a) 1200 (b) 1000 (c) 800
27. 27.You buy a notebook for ₹45 and a pen for ₹16. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.You start your homework at 5:45 and finish at 6:25. How many minutes did you work?
29. 29.330 − 298 =
30. 30.57 + 29 =
31. 31.529 − 486 =
32. 32.18 children stand in rows of 4. How many full rows can they make?
33. 33.37 − 9 =
34. 34.501 − 489 =
35. 35.16 + 9 =
36. 36.4 + ? = 10
37. 37.7 + ? = 10
38. 38.19 + ? = 100
39. 39.You buy a bag of mangoes for ₹63 and pay with a ₹100 note. How much change do you get, in rupees?
40. 40.Best estimate of 379 + 221? (a) 800 (b) 600 (c) 400

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