Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 389 · 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. 1.357 + 79 =
2. 2.1 + 8 + 1 + 5 + 9 =
3. 3.3 + 5 + 6 + 4 =
4. 4.31² =
5. 5.1700 ÷ 50 =
6. 6.3 + 6 + 4 + 4 =
7. 7.79 × 5 =
8. 8.13 × 11 =
9. 9.61² =
10. 10.520 − 46 =
11. 11.69 × 50 =
12. 12.Check with nines: 760 + 941 = 1697. Correct or wrong? (a) wrong (b) correct
13. 13.6 + 4 + 6 + 3 =
14. 14.96 × 50 =
15. 15.64 × 15 =
16. 16.18 × 15 =
17. 17.6 + 3 + 7 + 3 =
18. 18.18 × 15 =
19. 19.Check with nines: 15 × 67 = 1005. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 78 × 99 = 7722. Correct or wrong? (a) correct (b) wrong
21. 21.184 + 57 =
22. 22.Best estimate of 82 × 32? (a) 2400 (b) 4800 (c) 24000 (d) 240
23. 23.Check with nines: 887 + 796 = 1682. Correct or wrong? (a) correct (b) wrong
24. 24.41² =
25. 25.548 − 39 =
26. 26.Check with nines: 76 × 31 = 2360. Correct or wrong? (a) correct (b) wrong
27. 27.8 × 15 =
28. 28.1 + 7 + 8 + 2 + 8 =
29. 29.₹89.95 − ₹24.40 =
30. 30.9 + 5 + 9 + 5 + 9 =
31. 31.1 + 5 + 5 + 9 + 3 =
32. 32.4 + 1 + 2 + 8 + 5 =
33. 33.7 + 5 + 3 + 8 + 3 =
34. 34.Check with nines: 91 × 80 = 7282. Correct or wrong? (a) correct (b) wrong
35. 35.108 − 66 =
36. 36.60 + 78 + 87 + 61 =
37. 37.7 + 3 + 2 + 6 + 8 =
38. 38.36 × 50 =
39. 39.153 + 48 =
40. 40.1125 ÷ 25 =

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