Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 397 · 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. 1.583 − 77 =
2. 2.13 × 4 =
3. 3.19² =
4. 4.63 × 15 =
5. 5.354 + 98 =
6. 6.Best estimate of 58 × 69? (a) 420 (b) 42000 (c) 8400 (d) 4200
7. 7.25% of 690 =
8. 8.29² =
9. 9.20% of 580 =
10. 10.6 + 3 + 9 + 7 =
11. 11.625 ÷ 25 =
12. 12.Best estimate of 49 × 91? (a) 9000 (b) 450 (c) 4500 (d) 45000
13. 13.22 × 15 =
14. 14.Check with nines: 18 × 62 = 1121. Correct or wrong? (a) wrong (b) correct
15. 15.7 + 9 + 5 + 5 =
16. 16.9 × 15 =
17. 17.9 × 15 =
18. 18.₹28.35 − ₹24.05 =
19. 19.Best estimate of 92 × 41? (a) 360 (b) 36000 (c) 7200 (d) 3600
20. 20.19 × 18 =
21. 21.25 + 98 =
22. 22.167 − 29 =
23. 23.Best estimate of 803 × 8? (a) 6400 (b) 64000 (c) 12800 (d) 640
24. 24.12 × 11 =
25. 25.Best estimate of 103 × 9? (a) 9000 (b) 900 (c) 90 (d) 1800
26. 26.Check with nines: 753 + 323 = 1080. Correct or wrong? (a) wrong (b) correct
27. 27.75 × 4 =
28. 28.511 − 17 =
29. 29.₹69.50 − ₹11.25 =
30. 30.53 × 5 =
31. 31.Check with nines: 293 + 895 = 1188. Correct or wrong? (a) wrong (b) correct
32. 32.₹62.80 + ₹12.70 =
33. 33.₹14.85 + ₹35.10 =
34. 34.1550 ÷ 50 =
35. 35.65 × 5 =
36. 36.Best estimate of 42 × 41? (a) 160 (b) 1600 (c) 16000 (d) 3200
37. 37.Best estimate of 38 × 41? (a) 3200 (b) 16000 (c) 1600 (d) 160
38. 38.50% of 350 =
39. 39.150 ÷ 50 =
40. 40.10 × 15 =

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