Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 463 · 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. 1.15 × 16 =
2. 2.13 × 8 =
3. 3.77 × 5 =
4. 4.30 + 43 + 83 + 34 =
5. 5.58 × 15 =
6. 6.13 × 19 =
7. 7.39² =
8. 8.5 + 3 + 9 + 1 + 7 =
9. 9.Best estimate of 29 × 39? (a) 12000 (b) 1200 (c) 2400 (d) 120
10. 10.Best estimate of 598 × 8? (a) 4800 (b) 480 (c) 9600 (d) 48000
11. 11.16 × 15 =
12. 12.8 + 2 + 9 + 9 + 5 =
13. 13.63 + 68 + 22 + 69 =
14. 14.49² =
15. 15.7 + 5 + 5 + 2 =
16. 16.Check with nines: 69 × 39 = 2691. Correct or wrong? (a) wrong (b) correct
17. 17.22 × 4 =
18. 18.27 + 22 + 37 + 71 =
19. 19.₹65.85 − ₹21.25 =
20. 20.380 ÷ 5 =
21. 21.63 × 15 =
22. 22.46 + 53 + 65 + 45 =
23. 23.47 × 8 =
24. 24.18 × 14 =
25. 25.Best estimate of 88 × 72? (a) 6300 (b) 12600 (c) 630 (d) 63000
26. 26.21² =
27. 27.Best estimate of 72 × 71? (a) 49000 (b) 4900 (c) 9800 (d) 490
28. 28.88 + 18 + 60 + 39 =
29. 29.Check with nines: 788 + 963 = 1749. Correct or wrong? (a) wrong (b) correct
30. 30.15 × 18 =
31. 31.₹46.40 − ₹5.15 =
32. 32.382 + 79 =
33. 33.₹82.65 + ₹41.35 =
34. 34.133 × 4 =
35. 35.Best estimate of 42 × 38? (a) 3200 (b) 160 (c) 16000 (d) 1600
36. 36.₹77.25 + ₹19.75 =
37. 37.Best estimate of 103 × 4? (a) 800 (b) 4000 (c) 400 (d) 40
38. 38.214 + 48 =
39. 39.Best estimate of 799 × 4? (a) 32000 (b) 320 (c) 6400 (d) 3200
40. 40.Check with nines: 74 × 18 = 1332. Correct or wrong? (a) correct (b) wrong

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