Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 603 · 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. 1.42 × 50 =
2. 2.Check with nines: 60 × 98 = 5879. Correct or wrong? (a) correct (b) wrong
3. 3.41 × 5 =
4. 4.₹48.50 + ₹41.65 =
5. 5.Best estimate of 58 × 72? (a) 42000 (b) 420 (c) 8400 (d) 4200
6. 6.19 + 73 + 85 + 78 =
7. 7.45 × 50 =
8. 8.89² =
9. 9.1 + 6 + 3 + 4 =
10. 10.14 × 13 =
11. 11.₹25.40 + ₹15.95 =
12. 12.38 × 50 =
13. 13.Check with nines: 857 + 784 = 1641. Correct or wrong? (a) wrong (b) correct
14. 14.287 + 38 =
15. 15.12 × 18 =
16. 16.Best estimate of 397 × 8? (a) 320 (b) 3200 (c) 32000 (d) 6400
17. 17.5 × 15 =
18. 18.30 × 50 =
19. 19.252 + 38 =
20. 20.305 − 18 =
21. 21.16 × 15 =
22. 22.5% of 480 =
23. 23.159 − 97 =
24. 24.364 + 57 =
25. 25.254 + 29 =
26. 26.Best estimate of 303 × 5? (a) 150 (b) 15000 (c) 3000 (d) 1500
27. 27.24 × 15 =
28. 28.Check with nines: 52 × 61 = 3170. Correct or wrong? (a) correct (b) wrong
29. 29.443 + 37 =
30. 30.8 + 2 + 5 + 3 =
31. 31.413 + 17 =
32. 32.33 + 64 + 55 + 55 =
33. 33.259 + 79 =
34. 34.₹73.05 + ₹17.25 =
35. 35.72 + 77 =
36. 36.475 ÷ 5 =
37. 37.52 × 50 =
38. 38.11 × 15 =
39. 39.Best estimate of 297 × 9? (a) 5400 (b) 2700 (c) 270 (d) 27000
40. 40.157 − 78 =

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