Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 180 · 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. 1.21² =
2. 2.Double 49 =
3. 3.19 + 21 =
4. 4.Double 36 =
5. 5.25 + 8 =
6. 6.5% of ₹440 =
7. 7.You buy a box of crayons for ₹29 and a pen for ₹38. You pay with a ₹100 note. How much change do you get, in rupees?
8. 8.You buy a storybook for ₹17 and a pen for ₹21. You pay with a ₹100 note. How much change do you get, in rupees?
9. 9.You buy a bag of mangoes for ₹52 and pay with a ₹100 note. How much change do you get, in rupees?
10. 10.28² =
11. 11.60 ÷ 4 =
12. 12.50% of ₹310 =
13. 13.19² =
14. 14.25% of ₹560 =
15. 15.Best estimate of 291 + 732? (a) 800 (b) 1000 (c) 1200
16. 16.18² =
17. 17.36 × 7 =
18. 18.46 + 64 =
19. 19.64 + ? = 100
20. 20.25% of ₹300 =
21. 21.78 + 5 =
22. 22.41 × 8 =
23. 23.84 + 88 =
24. 24.Double 52 =
25. 25.4 + ? = 10
26. 26.84 ÷ 4 =
27. 27.80 − 14 =
28. 28.13² =
29. 29.17 + ? = 100
30. 30.Best estimate of 860 + 174? (a) 1300 (b) 1100 (c) 900
31. 31.A cricket match starts at 5:05 and the first innings ends at 7:30. How many minutes did the innings last?
32. 32.82 + ? = 100
33. 33.93 × 7 =
34. 34.29 × 4 =
35. 35.3 + ? = 10
36. 36.230 − 198 =
37. 37.84 − 23 =
38. 38.86 + ? = 100
39. 39.30 + 19 =
40. 40.320 ÷ 8 =

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