Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 781 · 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. 1.23 × 15 =
2. 2.1 + 7 + 9 + 6 =
3. 3.₹21.70 + ₹20.65 =
4. 4.₹94.70 − ₹13.45 =
5. 5.8 + 9 + 2 + 9 + 8 =
6. 6.Check with nines: 193 + 176 = 369. Correct or wrong? (a) wrong (b) correct
7. 7.8 × 15 =
8. 8.6 × 15 =
9. 9.21² =
10. 10.1450 ÷ 50 =
11. 11.Check with nines: 47 × 23 = 1081. Correct or wrong? (a) wrong (b) correct
12. 12.78 × 4 =
13. 13.Best estimate of 78 × 41? (a) 6400 (b) 32000 (c) 320 (d) 3200
14. 14.1% of 630 =
15. 15.Best estimate of 42 × 32? (a) 120 (b) 12000 (c) 2400 (d) 1200
16. 16.16 × 19 =
17. 17.87 + 99 =
18. 18.₹29.35 − ₹18.50 =
19. 19.₹79.10 + ₹12.50 =
20. 20.130 − 98 =
21. 21.52 × 50 =
22. 22.159 + 89 =
23. 23.₹28.40 + ₹33.85 =
24. 24.Best estimate of 599 × 3? (a) 180 (b) 18000 (c) 3600 (d) 1800
25. 25.57 × 15 =
26. 26.18 × 19 =
27. 27.39² =
28. 28.Check with nines: 292 + 405 = 697. Correct or wrong? (a) wrong (b) correct
29. 29.528 − 96 =
30. 30.357 + 27 =
31. 31.69 × 5 =
32. 32.32 + 20 + 24 + 87 =
33. 33.229 + 39 =
34. 34.19 × 16 =
35. 35.63 × 15 =
36. 36.Check with nines: 155 + 688 = 845. Correct or wrong? (a) wrong (b) correct
37. 37.Best estimate of 703 × 9? (a) 630 (b) 63000 (c) 12600 (d) 6300
38. 38.58 × 5 =
39. 39.1 + 6 + 4 + 4 + 3 =
40. 40.565 − 97 =

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