Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 828 · 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 + 5 + 1 + 3 =
2. 2.38 + 18 + 67 + 32 =
3. 3.19² =
4. 4.235 − 97 =
5. 5.₹9.15 + ₹6.55 =
6. 6.Check with nines: 22 × 23 = 506. Correct or wrong? (a) correct (b) wrong
7. 7.1 + 3 + 9 + 3 + 9 =
8. 8.158 × 4 =
9. 9.2 + 2 + 4 + 8 =
10. 10.11 × 12 =
11. 11.Best estimate of 102 × 8? (a) 8000 (b) 80 (c) 800 (d) 1600
12. 12.12 × 13 =
13. 13.11 × 13 =
14. 14.1% of 310 =
15. 15.2 + 1 + 5 + 9 + 3 =
16. 16.16 × 12 =
17. 17.84 + 49 + 87 + 19 =
18. 18.32 × 15 =
19. 19.Best estimate of 41 × 39? (a) 3200 (b) 16000 (c) 1600 (d) 160
20. 20.76 + 52 + 34 + 81 =
21. 21.351 − 57 =
22. 22.540 ÷ 5 =
23. 23.12 × 50 =
24. 24.544 − 77 =
25. 25.Check with nines: 723 + 820 = 1545. Correct or wrong? (a) wrong (b) correct
26. 26.95 ÷ 5 =
27. 27.₹40.95 − ₹6.60 =
28. 28.408 + 87 =
29. 29.15% of 720 =
30. 30.83 × 50 =
31. 31.87 + 39 =
32. 32.Check with nines: 609 + 213 = 823. Correct or wrong? (a) wrong (b) correct
33. 33.89² =
34. 34.Check with nines: 533 + 778 = 1311. Correct or wrong? (a) wrong (b) correct
35. 35.100 − 58 =
36. 36.7 + 5 + 3 + 5 =
37. 37.Best estimate of 31 × 61? (a) 180 (b) 1800 (c) 18000 (d) 3600
38. 38.421 + 28 =
39. 39.₹66.10 − ₹23.80 =
40. 40.12 × 12 =

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