Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 666 · 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. 1.58 + 78 =
2. 2.1850 ÷ 50 =
3. 3.12 × 17 =
4. 4.8 + 8 + 2 + 3 =
5. 5.33 × 15 =
6. 6.17 × 15 =
7. 7.Check with nines: 72 × 98 = 7060. Correct or wrong? (a) correct (b) wrong
8. 8.40 + 46 + 15 + 63 =
9. 9.25% of 630 =
10. 10.122 × 4 =
11. 11.Best estimate of 91 × 92? (a) 81000 (b) 810 (c) 8100 (d) 16200
12. 12.30 + 39 + 33 + 11 =
13. 13.Check with nines: 28 × 19 = 537. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 23 × 21 = 483. Correct or wrong? (a) correct (b) wrong
15. 15.14 + 73 + 76 + 47 =
16. 16.265 ÷ 5 =
17. 17.16 + 56 + 63 + 24 =
18. 18.1% of 140 =
19. 19.50 × 5 =
20. 20.450 ÷ 25 =
21. 21.₹18.40 − ₹3.05 =
22. 22.Check with nines: 755 + 962 = 1722. Correct or wrong? (a) wrong (b) correct
23. 23.15% of 530 =
24. 24.1 + 9 + 7 + 7 =
25. 25.Best estimate of 398 × 5? (a) 200 (b) 20000 (c) 2000 (d) 4000
26. 26.31 × 15 =
27. 27.519 − 49 =
28. 28.370 ÷ 5 =
29. 29.20% of 900 =
30. 30.5 + 2 + 9 + 5 + 8 =
31. 31.Best estimate of 701 × 5? (a) 7000 (b) 35000 (c) 350 (d) 3500
32. 32.710 ÷ 5 =
33. 33.120 ÷ 5 =
34. 34.92 × 50 =
35. 35.227 + 49 =
36. 36.394 − 76 =
37. 37.555 ÷ 5 =
38. 38.20% of 20 =
39. 39.Best estimate of 898 × 6? (a) 540 (b) 54000 (c) 10800 (d) 5400
40. 40.3 + 7 + 4 + 7 =

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