Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 213 · 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.₹58.05 − ₹41.75 =
2. 2.293 − 87 =
3. 3.451 − 97 =
4. 4.18 × 19 =
5. 5.284 − 66 =
6. 6.194 + 88 =
7. 7.65 × 5 =
8. 8.5 + 7 + 3 + 5 =
9. 9.1% of 420 =
10. 10.48 × 5 =
11. 11.15 × 18 =
12. 12.Best estimate of 48 × 21? (a) 100 (b) 2000 (c) 10000 (d) 1000
13. 13.348 + 77 =
14. 14.50 × 4 =
15. 15.₹74.25 + ₹15.40 =
16. 16.Check with nines: 561 + 384 = 949. Correct or wrong? (a) wrong (b) correct
17. 17.85 − 57 =
18. 18.103 − 78 =
19. 19.Check with nines: 584 + 922 = 1506. Correct or wrong? (a) correct (b) wrong
20. 20.77 + 24 + 59 + 55 =
21. 21.311 − 79 =
22. 22.264 + 19 =
23. 23.18 × 14 =
24. 24.1175 ÷ 25 =
25. 25.4 + 7 + 6 + 1 =
26. 26.Check with nines: 172 + 332 = 504. Correct or wrong? (a) wrong (b) correct
27. 27.357 − 16 =
28. 28.251 + 47 =
29. 29.Check with nines: 57 × 47 = 2680. Correct or wrong? (a) wrong (b) correct
30. 30.95 + 79 =
31. 31.410 + 67 =
32. 32.15 × 15 =
33. 33.266 − 28 =
34. 34.134 + 88 =
35. 35.1% of 890 =
36. 36.57 × 15 =
37. 37.23 × 50 =
38. 38.Check with nines: 78 × 45 = 3517. Correct or wrong? (a) correct (b) wrong
39. 39.230 ÷ 5 =
40. 40.96 − 89 =

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