Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 864 · 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.Best estimate of 399 × 6? (a) 4800 (b) 24000 (c) 2400 (d) 240
2. 2.Best estimate of 602 × 8? (a) 480 (b) 9600 (c) 4800 (d) 48000
3. 3.561 − 89 =
4. 4.189 − 89 =
5. 5.356 − 29 =
6. 6.10% of 120 =
7. 7.7 + 1 + 3 + 2 =
8. 8.21 + 59 + 47 + 45 =
9. 9.15 + 71 + 61 + 17 =
10. 10.750 ÷ 25 =
11. 11.41 × 15 =
12. 12.11 × 15 =
13. 13.15 × 15 =
14. 14.1% of 90 =
15. 15.111 − 47 =
16. 16.4 + 2 + 1 + 9 + 5 =
17. 17.45 × 5 =
18. 18.167 − 69 =
19. 19.Best estimate of 99 × 4? (a) 4000 (b) 40 (c) 800 (d) 400
20. 20.Check with nines: 531 + 613 = 1145. Correct or wrong? (a) wrong (b) correct
21. 21.130 − 36 =
22. 22.₹7.70 + ₹29.50 =
23. 23.165 − 88 =
24. 24.14 × 13 =
25. 25.59 × 15 =
26. 26.₹35.25 − ₹23.65 =
27. 27.Check with nines: 22 × 86 = 1892. Correct or wrong? (a) correct (b) wrong
28. 28.72 + 88 =
29. 29.₹78.10 + ₹19.85 =
30. 30.1% of 540 =
31. 31.Check with nines: 31 × 39 = 1208. Correct or wrong? (a) correct (b) wrong
32. 32.41 × 50 =
33. 33.2 + 2 + 6 + 8 + 8 =
34. 34.350 − 46 =
35. 35.20% of 720 =
36. 36.Best estimate of 18 × 21? (a) 40 (b) 800 (c) 4000 (d) 400
37. 37.Check with nines: 982 + 671 = 1655. Correct or wrong? (a) correct (b) wrong
38. 38.Best estimate of 501 × 4? (a) 200 (b) 4000 (c) 2000 (d) 20000
39. 39.12 × 15 =
40. 40.61² =

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