Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 989 · 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. 1.70 − 18 =
2. 2.425 ÷ 25 =
3. 3.79² =
4. 4.Check with nines: 20 × 49 = 980. Correct or wrong? (a) wrong (b) correct
5. 5.₹52.90 − ₹22.70 =
6. 6.34 × 5 =
7. 7.71² =
8. 8.61 × 8 =
9. 9.5 + 4 + 6 + 6 + 2 =
10. 10.23 + 84 + 65 + 50 =
11. 11.2 + 2 + 1 + 1 + 9 =
12. 12.171 + 97 =
13. 13.431 − 89 =
14. 14.10% of 530 =
15. 15.3 + 2 + 6 + 7 =
16. 16.₹22.30 + ₹34.40 =
17. 17.5 + 9 + 2 + 8 =
18. 18.Check with nines: 57 × 12 = 684. Correct or wrong? (a) wrong (b) correct
19. 19.138 + 59 =
20. 20.80 + 84 + 58 + 37 =
21. 21.31² =
22. 22.60 + 19 =
23. 23.25 × 15 =
24. 24.₹88.85 − ₹19.85 =
25. 25.Best estimate of 398 × 4? (a) 1600 (b) 3200 (c) 160 (d) 16000
26. 26.238 + 27 =
27. 27.6 + 1 + 1 + 9 =
28. 28.24 + 25 + 76 + 41 =
29. 29.508 − 38 =
30. 30.312 + 18 =
31. 31.61² =
32. 32.305 + 58 =
33. 33.5% of 150 =
34. 34.146 − 87 =
35. 35.161 − 89 =
36. 36.81² =
37. 37.Best estimate of 198 × 5? (a) 100 (b) 1000 (c) 10000 (d) 2000
38. 38.Check with nines: 696 + 327 = 1023. Correct or wrong? (a) wrong (b) correct
39. 39.61 × 50 =
40. 40.50% of 190 =

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