Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 150 · 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 × 4 =
2. 2.₹10.05 − ₹5.25 =
3. 3.1 + 9 + 9 + 1 + 3 =
4. 4.Check with nines: 52 × 54 = 2808. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 82 × 82 = 6724. Correct or wrong? (a) wrong (b) correct
6. 6.9 + 9 + 2 + 1 + 5 =
7. 7.39² =
8. 8.1 + 5 + 7 + 1 + 5 =
9. 9.134 − 97 =
10. 10.499 − 78 =
11. 11.76 × 50 =
12. 12.4 + 3 + 5 + 6 =
13. 13.406 + 27 =
14. 14.190 − 48 =
15. 15.Best estimate of 502 × 7? (a) 7000 (b) 350 (c) 35000 (d) 3500
16. 16.16 × 17 =
17. 17.496 + 18 =
18. 18.400 ÷ 50 =
19. 19.345 − 49 =
20. 20.30 × 15 =
21. 21.9 + 1 + 3 + 2 =
22. 22.14 × 11 =
23. 23.67 × 50 =
24. 24.72 × 50 =
25. 25.₹93.90 − ₹30.20 =
26. 26.144 + 37 =
27. 27.27 × 4 =
28. 28.21² =
29. 29.Best estimate of 92 × 39? (a) 7200 (b) 36000 (c) 3600 (d) 360
30. 30.38 + 60 + 43 + 30 =
31. 31.Check with nines: 784 + 258 = 1039. Correct or wrong? (a) wrong (b) correct
32. 32.43 × 15 =
33. 33.175 ÷ 25 =
34. 34.Best estimate of 41 × 72? (a) 2800 (b) 280 (c) 5600 (d) 28000
35. 35.61² =
36. 36.52 + 39 + 88 + 88 =
37. 37.20 × 15 =
38. 38.76 × 4 =
39. 39.414 − 97 =
40. 40.430 + 47 =

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