Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 391 · 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.Best estimate of 88 × 81? (a) 720 (b) 72000 (c) 14400 (d) 7200
2. 2.45 × 4 =
3. 3.Check with nines: 493 + 829 = 1322. Correct or wrong? (a) wrong (b) correct
4. 4.121 − 47 =
5. 5.84 + 70 + 46 + 26 =
6. 6.98 − 56 =
7. 7.92 × 4 =
8. 8.66 × 50 =
9. 9.48 + 80 + 73 + 59 =
10. 10.5 + 2 + 2 + 7 + 5 =
11. 11.401 + 28 =
12. 12.Check with nines: 943 + 539 = 1490. Correct or wrong? (a) wrong (b) correct
13. 13.₹22.15 + ₹12.15 =
14. 14.14 × 5 =
15. 15.86 + 81 + 28 + 87 =
16. 16.₹11.35 − ₹10.10 =
17. 17.11 × 15 =
18. 18.35 + 77 + 72 + 21 =
19. 19.Best estimate of 302 × 7? (a) 4200 (b) 210 (c) 21000 (d) 2100
20. 20.303 + 89 =
21. 21.25 × 5 =
22. 22.₹88.55 − ₹4.10 =
23. 23.₹44.40 + ₹10.15 =
24. 24.25 + 30 + 39 + 80 =
25. 25.26 × 5 =
26. 26.405 − 37 =
27. 27.700 ÷ 50 =
28. 28.50% of 610 =
29. 29.441 + 18 =
30. 30.₹41.65 − ₹41.15 =
31. 31.93 × 4 =
32. 32.129 × 4 =
33. 33.345 − 17 =
34. 34.29² =
35. 35.31 × 15 =
36. 36.245 + 99 =
37. 37.Best estimate of 401 × 9? (a) 36000 (b) 7200 (c) 360 (d) 3600
38. 38.5% of 400 =
39. 39.19 × 13 =
40. 40.117 − 46 =

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