Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 161 · 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. 1.485 + 18 =
2. 2.Check with nines: 70 × 56 = 3918. Correct or wrong? (a) correct (b) wrong
3. 3.15% of 380 =
4. 4.68 × 8 =
5. 5.46 × 5 =
6. 6.10% of 120 =
7. 7.₹18.40 + ₹23.15 =
8. 8.1 + 2 + 6 + 2 + 8 =
9. 9.9 + 9 + 9 + 8 + 1 =
10. 10.1 + 3 + 1 + 9 =
11. 11.75 + 11 + 76 + 69 =
12. 12.31² =
13. 13.4 + 3 + 6 + 3 =
14. 14.296 + 47 =
15. 15.19 × 15 =
16. 16.Best estimate of 103 × 7? (a) 700 (b) 70 (c) 7000 (d) 1400
17. 17.149 + 19 =
18. 18.100 + 99 =
19. 19.24 × 15 =
20. 20.₹90.15 + ₹34.65 =
21. 21.38 × 5 =
22. 22.52 × 4 =
23. 23.98 + 58 =
24. 24.79² =
25. 25.55 × 4 =
26. 26.Check with nines: 459 + 937 = 1396. Correct or wrong? (a) correct (b) wrong
27. 27.2 + 6 + 3 + 7 + 7 =
28. 28.Check with nines: 996 + 858 = 1855. Correct or wrong? (a) wrong (b) correct
29. 29.75 × 8 =
30. 30.12 × 5 =
31. 31.450 ÷ 50 =
32. 32.₹41.75 − ₹36.10 =
33. 33.333 − 67 =
34. 34.Check with nines: 98 × 15 = 1465. Correct or wrong? (a) wrong (b) correct
35. 35.413 + 98 =
36. 36.8 + 2 + 2 + 3 =
37. 37.263 − 48 =
38. 38.153 × 4 =
39. 39.1250 ÷ 25 =
40. 40.121 − 78 =

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