Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 771 · 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. 1.64 × 15 =
2. 2.1150 ÷ 25 =
3. 3.40 + 74 + 64 + 87 =
4. 4.61² =
5. 5.27 + 78 =
6. 6.31² =
7. 7.36 × 15 =
8. 8.97 + 29 =
9. 9.7 + 6 + 3 + 2 =
10. 10.160 − 49 =
11. 11.Best estimate of 82 × 22? (a) 160 (b) 3200 (c) 1600 (d) 16000
12. 12.₹45.35 − ₹8.55 =
13. 13.62 + 74 + 59 + 41 =
14. 14.Check with nines: 214 + 326 = 535. Correct or wrong? (a) correct (b) wrong
15. 15.₹50.35 − ₹41.65 =
16. 16.₹24.60 + ₹16.70 =
17. 17.25% of 690 =
18. 18.237 + 17 =
19. 19.12 × 18 =
20. 20.86 × 4 =
21. 21.7 + 1 + 8 + 3 =
22. 22.152 + 87 =
23. 23.9 + 2 + 4 + 9 + 1 =
24. 24.5% of 800 =
25. 25.₹30.40 − ₹5.35 =
26. 26.Best estimate of 52 × 52? (a) 25000 (b) 2500 (c) 250 (d) 5000
27. 27.11 × 13 =
28. 28.398 − 66 =
29. 29.Best estimate of 69 × 41? (a) 280 (b) 28000 (c) 5600 (d) 2800
30. 30.91² =
31. 31.₹60.75 + ₹37.15 =
32. 32.14 × 15 =
33. 33.44 × 50 =
34. 34.4 + 8 + 6 + 8 + 2 =
35. 35.486 − 49 =
36. 36.Check with nines: 27 × 53 = 1431. Correct or wrong? (a) wrong (b) correct
37. 37.103 + 49 =
38. 38.1 + 7 + 7 + 7 + 3 =
39. 39.68 + 60 + 37 + 69 =
40. 40.19 × 15 =

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