Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 10 · 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. 1.51 × 4 =
2. 2.56 × 8 =
3. 3.Check with nines: 525 + 411 = 936. Correct or wrong? (a) wrong (b) correct
4. 4.Best estimate of 298 × 8? (a) 2400 (b) 24000 (c) 4800 (d) 240
5. 5.1 + 9 + 8 + 8 + 4 =
6. 6.81² =
7. 7.₹30.70 − ₹29.10 =
8. 8.Check with nines: 791 + 740 = 1531. Correct or wrong? (a) correct (b) wrong
9. 9.945 ÷ 5 =
10. 10.65 + 87 =
11. 11.59² =
12. 12.11 × 14 =
13. 13.94 + 38 =
14. 14.₹91.95 + ₹35.15 =
15. 15.20 × 5 =
16. 16.471 − 96 =
17. 17.127 − 58 =
18. 18.18 × 19 =
19. 19.21² =
20. 20.Check with nines: 43 × 99 = 4257. Correct or wrong? (a) wrong (b) correct
21. 21.2 + 1 + 9 + 7 =
22. 22.61² =
23. 23.133 − 39 =
24. 24.274 + 58 =
25. 25.Best estimate of 32 × 71? (a) 4200 (b) 2100 (c) 21000 (d) 210
26. 26.18 × 50 =
27. 27.72 × 8 =
28. 28.586 − 76 =
29. 29.272 + 98 =
30. 30.₹26.20 − ₹18.50 =
31. 31.37 × 15 =
32. 32.585 − 39 =
33. 33.₹26.05 − ₹13.40 =
34. 34.Check with nines: 35 × 73 = 2555. Correct or wrong? (a) wrong (b) correct
35. 35.79 + 66 + 27 + 65 =
36. 36.1 + 5 + 3 + 7 =
37. 37.19² =
38. 38.27 × 15 =
39. 39.15% of 210 =
40. 40.375 + 29 =

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