Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 842 · 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.Best estimate of 19 × 18? (a) 40 (b) 4000 (c) 800 (d) 400
2. 2.36 × 15 =
3. 3.₹81.65 + ₹21.85 =
4. 4.181 − 58 =
5. 5.Best estimate of 699 × 5? (a) 350 (b) 35000 (c) 7000 (d) 3500
6. 6.465 + 87 =
7. 7.221 + 39 =
8. 8.380 + 48 =
9. 9.533 − 36 =
10. 10.1 + 8 + 8 + 2 + 2 =
11. 11.447 − 26 =
12. 12.Check with nines: 806 + 763 = 1569. Correct or wrong? (a) correct (b) wrong
13. 13.60 × 15 =
14. 14.Best estimate of 38 × 62? (a) 4800 (b) 24000 (c) 240 (d) 2400
15. 15.Check with nines: 79 × 72 = 5688. Correct or wrong? (a) correct (b) wrong
16. 16.50% of 430 =
17. 17.7 + 6 + 5 + 3 =
18. 18.93 × 5 =
19. 19.1% of 500 =
20. 20.₹34.20 − ₹17.80 =
21. 21.32 × 4 =
22. 22.11 × 12 =
23. 23.15 × 17 =
24. 24.3 + 8 + 8 + 2 =
25. 25.69² =
26. 26.87 + 59 =
27. 27.Check with nines: 56 × 65 = 3647. Correct or wrong? (a) wrong (b) correct
28. 28.84 × 4 =
29. 29.51² =
30. 30.Best estimate of 18 × 41? (a) 800 (b) 1600 (c) 8000 (d) 80
31. 31.8 + 2 + 4 + 7 + 6 =
32. 32.₹72.40 − ₹25.50 =
33. 33.Best estimate of 18 × 62? (a) 120 (b) 1200 (c) 2400 (d) 12000
34. 34.19 × 12 =
35. 35.Check with nines: 618 + 828 = 1446. Correct or wrong? (a) wrong (b) correct
36. 36.Best estimate of 197 × 7? (a) 1400 (b) 14000 (c) 140 (d) 2800
37. 37.Check with nines: 35 × 24 = 845. Correct or wrong? (a) correct (b) wrong
38. 38.46 + 27 + 31 + 11 =
39. 39.11 × 13 =
40. 40.7 × 15 =

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