Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 908 · 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. 1.35 + 48 + 18 + 14 =
2. 2.61² =
3. 3.Best estimate of 597 × 9? (a) 10800 (b) 5400 (c) 540 (d) 54000
4. 4.18 × 8 =
5. 5.443 − 87 =
6. 6.2 + 2 + 3 + 7 + 8 =
7. 7.14 × 14 =
8. 8.256 − 36 =
9. 9.Check with nines: 12 × 77 = 922. Correct or wrong? (a) wrong (b) correct
10. 10.35 × 15 =
11. 11.5 + 9 + 5 + 8 + 7 =
12. 12.79² =
13. 13.Best estimate of 92 × 29? (a) 27000 (b) 2700 (c) 5400 (d) 270
14. 14.240 − 48 =
15. 15.Best estimate of 81 × 88? (a) 7200 (b) 72000 (c) 720 (d) 14400
16. 16.9 + 7 + 1 + 9 =
17. 17.396 + 89 =
18. 18.2 + 8 + 2 + 2 =
19. 19.20% of 100 =
20. 20.₹20.45 − ₹8.50 =
21. 21.437 − 66 =
22. 22.331 − 36 =
23. 23.15 × 14 =
24. 24.15 × 17 =
25. 25.9 + 1 + 1 + 1 =
26. 26.4 + 3 + 3 + 5 + 7 =
27. 27.11 + 17 + 83 + 73 =
28. 28.17 × 12 =
29. 29.Check with nines: 994 + 702 = 1700. Correct or wrong? (a) correct (b) wrong
30. 30.900 ÷ 50 =
31. 31.3 + 5 + 4 + 5 + 8 =
32. 32.400 − 97 =
33. 33.350 + 29 =
34. 34.6 × 15 =
35. 35.6 + 4 + 6 + 2 =
36. 36.Check with nines: 19 × 19 = 353. Correct or wrong? (a) correct (b) wrong
37. 37.61² =
38. 38.149 × 4 =
39. 39.139 + 18 =
40. 40.103 × 4 =

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