Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 113 · 40 questions

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

1. 1.₹88.70 − ₹43.45 =
2. 2.Check with nines: 500 + 713 = 1213. Correct or wrong? (a) correct (b) wrong
3. 3.38 × 15 =
4. 4.275 + 27 =
5. 5.1125 ÷ 25 =
6. 6.42 + 68 + 70 + 87 =
7. 7.214 − 19 =
8. 8.48 × 4 =
9. 9.Check with nines: 37 × 15 = 549. Correct or wrong? (a) correct (b) wrong
10. 10.₹44.55 + ₹28.80 =
11. 11.Best estimate of 42 × 29? (a) 2400 (b) 120 (c) 1200 (d) 12000
12. 12.41 × 15 =
13. 13.Best estimate of 32 × 69? (a) 21000 (b) 4200 (c) 2100 (d) 210
14. 14.Best estimate of 898 × 7? (a) 630 (b) 6300 (c) 63000 (d) 12600
15. 15.50% of 160 =
16. 16.479 + 27 =
17. 17.40 + 77 =
18. 18.35 × 4 =
19. 19.8 × 15 =
20. 20.91² =
21. 21.18 × 12 =
22. 22.121 − 57 =
23. 23.₹69.35 + ₹32.70 =
24. 24.65 × 4 =
25. 25.49² =
26. 26.42 × 5 =
27. 27.Check with nines: 639 + 529 = 1168. Correct or wrong? (a) correct (b) wrong
28. 28.15 × 15 =
29. 29.240 − 69 =
30. 30.289 − 67 =
31. 31.5 × 15 =
32. 32.111 − 49 =
33. 33.14 × 19 =
34. 34.92 × 5 =
35. 35.518 − 37 =
36. 36.Check with nines: 38 × 47 = 1779. Correct or wrong? (a) wrong (b) correct
37. 37.60 + 46 + 70 + 47 =
38. 38.Check with nines: 91 × 44 = 4004. Correct or wrong? (a) correct (b) wrong
39. 39.Best estimate of 49 × 29? (a) 150 (b) 15000 (c) 3000 (d) 1500
40. 40.Best estimate of 701 × 4? (a) 5600 (b) 280 (c) 28000 (d) 2800

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