Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 102 · 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.Check with nines: 15 × 15 = 221. Correct or wrong? (a) wrong (b) correct
2. 2.1% of 340 =
3. 3.15% of 300 =
4. 4.112 − 18 =
5. 5.85 × 5 =
6. 6.39² =
7. 7.1050 ÷ 50 =
8. 8.25% of 710 =
9. 9.20 × 5 =
10. 10.50% of 90 =
11. 11.1 + 8 + 1 + 8 + 9 =
12. 12.225 − 26 =
13. 13.79² =
14. 14.4 + 6 + 1 + 5 =
15. 15.940 ÷ 5 =
16. 16.10% of 760 =
17. 17.25 × 4 =
18. 18.₹15.10 + ₹38.15 =
19. 19.19 × 15 =
20. 20.19 × 15 =
21. 21.₹86.50 + ₹24.25 =
22. 22.Check with nines: 978 + 257 = 1243. Correct or wrong? (a) wrong (b) correct
23. 23.48 × 15 =
24. 24.347 + 49 =
25. 25.10% of 680 =
26. 26.35 + 11 + 52 + 14 =
27. 27.₹21.80 − ₹21.65 =
28. 28.25% of 400 =
29. 29.445 ÷ 5 =
30. 30.Best estimate of 701 × 6? (a) 42000 (b) 8400 (c) 4200 (d) 420
31. 31.11 × 13 =
32. 32.9 + 9 + 3 + 1 =
33. 33.Best estimate of 22 × 92? (a) 180 (b) 3600 (c) 1800 (d) 18000
34. 34.5 + 5 + 8 + 5 =
35. 35.17 × 11 =
36. 36.₹15.70 + ₹24.80 =
37. 37.86 × 5 =
38. 38.₹11.40 − ₹7.55 =
39. 39.Check with nines: 78 × 26 = 2035. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 867 + 452 = 1327. Correct or wrong? (a) wrong (b) correct

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