Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 755 · 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. 1.985 ÷ 5 =
2. 2.14 × 8 =
3. 3.355 ÷ 5 =
4. 4.Check with nines: 446 + 362 = 801. Correct or wrong? (a) wrong (b) correct
5. 5.39² =
6. 6.380 − 67 =
7. 7.Check with nines: 77 × 26 = 1998. Correct or wrong? (a) correct (b) wrong
8. 8.25% of 20 =
9. 9.Check with nines: 29 × 51 = 1472. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 20 × 21 = 423. Correct or wrong? (a) correct (b) wrong
11. 11.13 × 12 =
12. 12.Check with nines: 898 + 215 = 1105. Correct or wrong? (a) wrong (b) correct
13. 13.95 × 4 =
14. 14.89² =
15. 15.Best estimate of 51 × 72? (a) 350 (b) 35000 (c) 7000 (d) 3500
16. 16.3 + 9 + 1 + 7 + 7 =
17. 17.Check with nines: 65 × 47 = 3055. Correct or wrong? (a) wrong (b) correct
18. 18.₹84.55 + ₹30.95 =
19. 19.40 × 15 =
20. 20.554 − 58 =
21. 21.Best estimate of 52 × 18? (a) 1000 (b) 100 (c) 2000 (d) 10000
22. 22.7 + 3 + 5 + 5 =
23. 23.64 × 50 =
24. 24.₹23.15 + ₹2.65 =
25. 25.281 + 87 =
26. 26.10% of 110 =
27. 27.800 ÷ 25 =
28. 28.15 × 8 =
29. 29.115 × 4 =
30. 30.21 × 8 =
31. 31.21 × 15 =
32. 32.65 × 50 =
33. 33.Check with nines: 60 × 87 = 5223. Correct or wrong? (a) correct (b) wrong
34. 34.875 ÷ 25 =
35. 35.1 + 1 + 4 + 2 + 6 =
36. 36.342 − 27 =
37. 37.Check with nines: 88 × 61 = 5368. Correct or wrong? (a) wrong (b) correct
38. 38.39 × 50 =
39. 39.45 × 8 =
40. 40.Best estimate of 61 × 78? (a) 4800 (b) 480 (c) 48000 (d) 9600

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