Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 569 · 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. 1.18 + 7 =
2. 2.You buy a kite for ₹33 and a pen for ₹12. You pay with a ₹100 note. How much change do you get, in rupees?
3. 3.Double 23 =
4. 4.You start your homework at 3:15 and finish at 3:50. How many minutes did you work?
5. 5.What is the remainder when 28 is divided by 3?
6. 6.90 − 21 =
7. 7.You buy a box of crayons for ₹24 and a pen for ₹41. You pay with a ₹100 note. How much change do you get, in rupees?
8. 8.5% of ₹550 =
9. 9.Best estimate of 648 + 708? (a) 1500 (b) 1300 (c) 1100
10. 10.17 + 4 =
11. 11.208 − 177 =
12. 12.27 − 9 =
13. 13.27 + 26 =
14. 14.49 − 9 =
15. 15.8 + 7 =
16. 16.You buy a cricket ball for ₹13 and a pen for ₹43. You pay with a ₹100 note. How much change do you get, in rupees?
17. 17.50 × 4 =
18. 18.285 − 99 =
19. 19.You buy a storybook for ₹176 and pay with a ₹500 note. How much change do you get, in rupees?
20. 20.65 + 7 =
21. 21.8 + ? = 10
22. 22.Best estimate of 320 + 597? (a) 1100 (b) 900 (c) 700
23. 23.26 × 4 =
24. 24.105 − 93 =
25. 25.232 ÷ 8 =
26. 26.73 × 9 =
27. 27.21² =
28. 28.75 + ? = 100
29. 29.2 + ? = 10
30. 30.176 ÷ 8 =
31. 31.24² =
32. 32.69 + 6 =
33. 33.310 − 292 =
34. 34.9 + 11 =
35. 35.49 + 9 =
36. 36.15 + 7 =
37. 37.15 + ? = 100
38. 38.22² =
39. 39.You buy a bag of mangoes for ₹463 and pay with a ₹500 note. How much change do you get, in rupees?
40. 40.Best estimate of 685 + 754? (a) 1500 (b) 1700 (c) 1300

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