Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 271 · 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. 1.390 − 39 =
2. 2.₹75.90 + ₹13.90 =
3. 3.164 − 27 =
4. 4.52 × 8 =
5. 5.15% of 110 =
6. 6.415 − 18 =
7. 7.Best estimate of 402 × 5? (a) 200 (b) 20000 (c) 4000 (d) 2000
8. 8.69² =
9. 9.25% of 380 =
10. 10.48 + 23 + 68 + 72 =
11. 11.5 + 6 + 2 + 4 =
12. 12.Best estimate of 79 × 39? (a) 320 (b) 32000 (c) 3200 (d) 6400
13. 13.16 × 16 =
14. 14.275 ÷ 25 =
15. 15.64 × 8 =
16. 16.6 × 15 =
17. 17.Check with nines: 37 × 26 = 967. Correct or wrong? (a) correct (b) wrong
18. 18.61² =
19. 19.12 × 13 =
20. 20.98 × 50 =
21. 21.11 × 16 =
22. 22.12 × 15 =
23. 23.₹31.50 − ₹6.45 =
24. 24.₹80.60 − ₹20.20 =
25. 25.₹30.90 + ₹20.20 =
26. 26.2 + 2 + 7 + 3 =
27. 27.59² =
28. 28.478 + 99 =
29. 29.545 − 69 =
30. 30.59² =
31. 31.38 × 15 =
32. 32.60 + 88 =
33. 33.13 × 18 =
34. 34.Check with nines: 36 × 41 = 1476. Correct or wrong? (a) wrong (b) correct
35. 35.15 + 26 + 28 + 51 =
36. 36.69² =
37. 37.560 ÷ 5 =
38. 38.30 + 12 + 76 + 17 =
39. 39.Check with nines: 97 × 63 = 6111. Correct or wrong? (a) correct (b) wrong
40. 40.6 × 15 =

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