Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 458 · 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. 1.13 × 5 =
2. 2.575 − 76 =
3. 3.Check with nines: 83 × 31 = 2567. Correct or wrong? (a) correct (b) wrong
4. 4.416 − 26 =
5. 5.2 + 7 + 5 + 8 + 3 =
6. 6.6 + 9 + 9 + 2 + 1 =
7. 7.Best estimate of 497 × 5? (a) 25000 (b) 2500 (c) 5000 (d) 250
8. 8.Check with nines: 440 + 570 = 1016. Correct or wrong? (a) wrong (b) correct
9. 9.7 + 3 + 7 + 3 =
10. 10.35 + 52 + 72 + 66 =
11. 11.558 − 79 =
12. 12.Check with nines: 57 × 69 = 3935. Correct or wrong? (a) correct (b) wrong
13. 13.12 × 15 =
14. 14.7 + 3 + 2 + 5 + 3 =
15. 15.Check with nines: 593 + 583 = 1168. Correct or wrong? (a) wrong (b) correct
16. 16.86 × 4 =
17. 17.Best estimate of 58 × 78? (a) 9600 (b) 48000 (c) 4800 (d) 480
18. 18.21² =
19. 19.384 + 88 =
20. 20.39² =
21. 21.₹22.15 + ₹26.45 =
22. 22.Best estimate of 21 × 68? (a) 2800 (b) 1400 (c) 14000 (d) 140
23. 23.Best estimate of 72 × 39? (a) 2800 (b) 28000 (c) 280 (d) 5600
24. 24.₹19.15 − ₹18.90 =
25. 25.975 ÷ 5 =
26. 26.14 × 5 =
27. 27.15 × 5 =
28. 28.128 + 48 =
29. 29.7 + 3 + 6 + 7 + 2 =
30. 30.Best estimate of 198 × 6? (a) 120 (b) 1200 (c) 12000 (d) 2400
31. 31.327 − 48 =
32. 32.18 × 19 =
33. 33.396 + 57 =
34. 34.₹72.80 − ₹38.65 =
35. 35.85 × 5 =
36. 36.61 + 28 =
37. 37.19 × 17 =
38. 38.39 + 89 =
39. 39.54 × 4 =
40. 40.14 × 12 =

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