Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 713 · 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. 1.584 − 37 =
2. 2.₹41.25 + ₹22.95 =
3. 3.5 + 4 + 4 + 5 =
4. 4.5% of 100 =
5. 5.459 − 49 =
6. 6.Check with nines: 18 × 72 = 1299. Correct or wrong? (a) wrong (b) correct
7. 7.13 × 15 =
8. 8.₹44.40 − ₹20.10 =
9. 9.63 × 4 =
10. 10.9 + 2 + 1 + 1 =
11. 11.Best estimate of 399 × 8? (a) 6400 (b) 32000 (c) 320 (d) 3200
12. 12.50 × 15 =
13. 13.347 + 38 =
14. 14.9 + 1 + 3 + 1 + 2 =
15. 15.Check with nines: 91 × 94 = 8557. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 88 × 93 = 8184. Correct or wrong? (a) wrong (b) correct
17. 17.₹29.45 + ₹21.25 =
18. 18.351 − 27 =
19. 19.Best estimate of 58 × 91? (a) 10800 (b) 5400 (c) 54000 (d) 540
20. 20.204 − 28 =
21. 21.17 × 15 =
22. 22.Best estimate of 202 × 7? (a) 1400 (b) 14000 (c) 2800 (d) 140
23. 23.60 × 15 =
24. 24.5 + 6 + 5 + 7 =
25. 25.Check with nines: 308 + 784 = 1092. Correct or wrong? (a) correct (b) wrong
26. 26.20% of 880 =
27. 27.169 − 68 =
28. 28.13 × 11 =
29. 29.86 + 37 =
30. 30.Check with nines: 806 + 782 = 1588. Correct or wrong? (a) wrong (b) correct
31. 31.207 + 39 =
32. 32.51 × 8 =
33. 33.564 − 47 =
34. 34.Best estimate of 18 × 41? (a) 800 (b) 1600 (c) 80 (d) 8000
35. 35.447 − 37 =
36. 36.10% of 560 =
37. 37.65 × 50 =
38. 38.Check with nines: 19 × 78 = 1482. Correct or wrong? (a) correct (b) wrong
39. 39.51 × 15 =
40. 40.Check with nines: 77 × 12 = 924. Correct or wrong? (a) wrong (b) correct

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