Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 777 · 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. 1.5 × 15 =
2. 2.75 ÷ 5 =
3. 3.4 + 4 + 9 + 1 + 2 =
4. 4.59 × 15 =
5. 5.12 × 18 =
6. 6.49² =
7. 7.4 + 1 + 7 + 4 + 3 =
8. 8.164 − 86 =
9. 9.42 × 15 =
10. 10.18 × 11 =
11. 11.Check with nines: 474 + 415 = 889. Correct or wrong? (a) correct (b) wrong
12. 12.214 + 29 =
13. 13.Best estimate of 48 × 68? (a) 35000 (b) 350 (c) 7000 (d) 3500
14. 14.13 × 17 =
15. 15.Check with nines: 58 × 68 = 3939. Correct or wrong? (a) correct (b) wrong
16. 16.20% of 130 =
17. 17.13 × 12 =
18. 18.27 × 4 =
19. 19.141 − 96 =
20. 20.212 − 68 =
21. 21.384 + 47 =
22. 22.154 − 97 =
23. 23.79² =
24. 24.69 × 8 =
25. 25.18 × 15 =
26. 26.445 − 37 =
27. 27.Best estimate of 203 × 5? (a) 10000 (b) 100 (c) 1000 (d) 2000
28. 28.Best estimate of 78 × 28? (a) 4800 (b) 24000 (c) 240 (d) 2400
29. 29.61² =
30. 30.162 + 37 =
31. 31.Best estimate of 899 × 6? (a) 54000 (b) 540 (c) 10800 (d) 5400
32. 32.₹67.50 − ₹29.85 =
33. 33.24 × 15 =
34. 34.13 × 17 =
35. 35.10% of 740 =
36. 36.Best estimate of 399 × 3? (a) 1200 (b) 120 (c) 12000 (d) 2400
37. 37.407 − 59 =
38. 38.15% of 510 =
39. 39.21² =
40. 40.40 × 15 =

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