Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 497 · 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. 1.8 + 1 + 3 + 9 + 9 =
2. 2.33 × 15 =
3. 3.59² =
4. 4.Check with nines: 93 × 92 = 8556. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 295 + 486 = 774. Correct or wrong? (a) correct (b) wrong
6. 6.69 × 8 =
7. 7.Check with nines: 360 + 381 = 741. Correct or wrong? (a) wrong (b) correct
8. 8.₹20.60 + ₹44.80 =
9. 9.Check with nines: 69 × 21 = 1456. Correct or wrong? (a) wrong (b) correct
10. 10.586 − 36 =
11. 11.5 + 9 + 2 + 8 =
12. 12.278 + 17 =
13. 13.116 × 4 =
14. 14.184 − 36 =
15. 15.1400 ÷ 25 =
16. 16.12 × 5 =
17. 17.38 × 8 =
18. 18.Best estimate of 61 × 28? (a) 3600 (b) 1800 (c) 180 (d) 18000
19. 19.675 ÷ 25 =
20. 20.25% of 110 =
21. 21.Best estimate of 203 × 9? (a) 3600 (b) 18000 (c) 1800 (d) 180
22. 22.8 × 15 =
23. 23.74 + 99 =
24. 24.1 + 4 + 6 + 6 + 9 =
25. 25.75 + 98 =
26. 26.49 × 50 =
27. 27.19² =
28. 28.62 + 57 =
29. 29.Best estimate of 48 × 91? (a) 45000 (b) 450 (c) 4500 (d) 9000
30. 30.1 + 9 + 1 + 2 + 2 =
31. 31.₹74.60 − ₹16.55 =
32. 32.2 + 4 + 6 + 2 =
33. 33.Best estimate of 81 × 39? (a) 32000 (b) 320 (c) 6400 (d) 3200
34. 34.21 × 15 =
35. 35.5 + 6 + 3 + 7 + 7 =
36. 36.350 ÷ 50 =
37. 37.₹92.85 − ₹36.05 =
38. 38.₹16.05 + ₹37.75 =
39. 39.95 + 38 =
40. 40.60 × 15 =

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