Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 423 · 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.Check with nines: 962 + 898 = 1860. Correct or wrong? (a) correct (b) wrong
2. 2.112 + 48 =
3. 3.41 × 15 =
4. 4.Best estimate of 41 × 51? (a) 4000 (b) 20000 (c) 2000 (d) 200
5. 5.456 − 87 =
6. 6.255 + 47 =
7. 7.61² =
8. 8.₹77.75 + ₹21.90 =
9. 9.244 + 68 =
10. 10.7 + 3 + 9 + 1 =
11. 11.72 × 50 =
12. 12.60 × 8 =
13. 13.15% of 750 =
14. 14.92 × 5 =
15. 15.750 ÷ 50 =
16. 16.373 + 29 =
17. 17.1% of 310 =
18. 18.20% of 120 =
19. 19.4 + 3 + 2 + 7 + 7 =
20. 20.64 × 15 =
21. 21.459 + 59 =
22. 22.7 + 8 + 1 + 3 + 9 =
23. 23.90 × 5 =
24. 24.6 + 2 + 1 + 3 + 4 =
25. 25.Check with nines: 15 × 99 = 1485. Correct or wrong? (a) correct (b) wrong
26. 26.₹16.95 − ₹5.50 =
27. 27.Best estimate of 21 × 18? (a) 40 (b) 400 (c) 4000 (d) 800
28. 28.257 + 49 =
29. 29.5% of 530 =
30. 30.Best estimate of 21 × 91? (a) 180 (b) 3600 (c) 1800 (d) 18000
31. 31.Check with nines: 79 × 82 = 6482. Correct or wrong? (a) correct (b) wrong
32. 32.40 × 5 =
33. 33.₹69.10 + ₹41.65 =
34. 34.134 + 47 =
35. 35.42 × 15 =
36. 36.Best estimate of 598 × 9? (a) 5400 (b) 54000 (c) 540 (d) 10800
37. 37.15 × 8 =
38. 38.Check with nines: 532 + 233 = 771. Correct or wrong? (a) correct (b) wrong
39. 39.20% of 220 =
40. 40.48 × 4 =

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