Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 775 · 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. 1.30 × 50 =
2. 2.24 × 50 =
3. 3.26 × 15 =
4. 4.595 − 69 =
5. 5.Check with nines: 825 + 715 = 1540. Correct or wrong? (a) wrong (b) correct
6. 6.150 + 89 =
7. 7.71² =
8. 8.18 × 16 =
9. 9.400 + 89 =
10. 10.89 × 50 =
11. 11.Check with nines: 50 × 82 = 4094. Correct or wrong? (a) correct (b) wrong
12. 12.1 + 3 + 1 + 1 + 7 =
13. 13.75 × 50 =
14. 14.13 × 16 =
15. 15.45 × 8 =
16. 16.8 + 8 + 9 + 2 =
17. 17.4 + 2 + 2 + 4 + 8 =
18. 18.₹97.20 + ₹35.90 =
19. 19.124 × 4 =
20. 20.2 + 5 + 9 + 8 + 5 =
21. 21.₹37.15 − ₹3.15 =
22. 22.40 × 15 =
23. 23.395 + 49 =
24. 24.169 − 99 =
25. 25.8 × 15 =
26. 26.8 + 1 + 2 + 5 + 5 =
27. 27.Check with nines: 678 + 725 = 1409. Correct or wrong? (a) wrong (b) correct
28. 28.138 × 4 =
29. 29.89² =
30. 30.517 − 37 =
31. 31.13 × 4 =
32. 32.Best estimate of 52 × 72? (a) 3500 (b) 350 (c) 7000 (d) 35000
33. 33.51² =
34. 34.Check with nines: 15 × 69 = 1035. Correct or wrong? (a) wrong (b) correct
35. 35.387 − 87 =
36. 36.254 − 19 =
37. 37.₹27.20 + ₹24.15 =
38. 38.Check with nines: 18 × 50 = 908. Correct or wrong? (a) wrong (b) correct
39. 39.79² =
40. 40.₹52.55 − ₹44.55 =

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