Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 929 · 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. 1.40 × 15 =
2. 2.7 + 7 + 9 + 2 + 3 =
3. 3.598 − 39 =
4. 4.13 × 16 =
5. 5.71² =
6. 6.115 + 18 =
7. 7.17 × 14 =
8. 8.24 × 5 =
9. 9.Best estimate of 797 × 8? (a) 640 (b) 12800 (c) 64000 (d) 6400
10. 10.25% of 110 =
11. 11.58 + 51 + 24 + 50 =
12. 12.Check with nines: 79 × 75 = 5932. Correct or wrong? (a) correct (b) wrong
13. 13.31 + 25 + 29 + 54 =
14. 14.361 − 56 =
15. 15.Check with nines: 27 × 57 = 1539. Correct or wrong? (a) wrong (b) correct
16. 16.25% of 320 =
17. 17.Best estimate of 598 × 7? (a) 42000 (b) 8400 (c) 4200 (d) 420
18. 18.134 × 4 =
19. 19.21 × 15 =
20. 20.Best estimate of 62 × 32? (a) 3600 (b) 180 (c) 1800 (d) 18000
21. 21.174 + 28 =
22. 22.150 − 67 =
23. 23.₹76.40 − ₹37.90 =
24. 24.225 − 98 =
25. 25.20% of 370 =
26. 26.₹72.10 − ₹39.10 =
27. 27.₹64.40 − ₹15.30 =
28. 28.Check with nines: 33 × 14 = 466. Correct or wrong? (a) correct (b) wrong
29. 29.15 × 14 =
30. 30.23 + 89 + 37 + 84 =
31. 31.5 × 15 =
32. 32.12 × 17 =
33. 33.775 ÷ 25 =
34. 34.27 × 5 =
35. 35.19 × 12 =
36. 36.Best estimate of 103 × 9? (a) 1800 (b) 90 (c) 900 (d) 9000
37. 37.314 + 57 =
38. 38.425 − 57 =
39. 39.330 − 57 =
40. 40.209 + 38 =

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