Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 198 · 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 59 × 41? (a) 4800 (b) 240 (c) 24000 (d) 2400
2. 2.45 × 4 =
3. 3.Check with nines: 59 × 90 = 5313. Correct or wrong? (a) correct (b) wrong
4. 4.14 × 15 =
5. 5.Check with nines: 676 + 720 = 1396. Correct or wrong? (a) wrong (b) correct
6. 6.15 × 12 =
7. 7.₹90.60 − ₹25.70 =
8. 8.70 + 15 + 31 + 67 =
9. 9.20% of 870 =
10. 10.1 + 2 + 7 + 8 =
11. 11.17 × 14 =
12. 12.48 × 4 =
13. 13.60 + 75 + 41 + 73 =
14. 14.Best estimate of 198 × 6? (a) 1200 (b) 12000 (c) 120 (d) 2400
15. 15.86 × 5 =
16. 16.Best estimate of 399 × 3? (a) 1200 (b) 120 (c) 2400 (d) 12000
17. 17.465 + 99 =
18. 18.Best estimate of 903 × 8? (a) 720 (b) 14400 (c) 7200 (d) 72000
19. 19.Best estimate of 18 × 19? (a) 800 (b) 400 (c) 4000 (d) 40
20. 20.7 × 15 =
21. 21.13 + 72 + 74 + 68 =
22. 22.Check with nines: 77 × 91 = 7007. Correct or wrong? (a) correct (b) wrong
23. 23.86 + 12 + 62 + 71 =
24. 24.84 × 5 =
25. 25.342 − 46 =
26. 26.16 × 15 =
27. 27.450 ÷ 50 =
28. 28.91² =
29. 29.Check with nines: 892 + 363 = 1253. Correct or wrong? (a) correct (b) wrong
30. 30.1% of 500 =
31. 31.411 − 46 =
32. 32.64 × 15 =
33. 33.Best estimate of 62 × 58? (a) 3600 (b) 36000 (c) 7200 (d) 360
34. 34.6 × 15 =
35. 35.Best estimate of 81 × 62? (a) 480 (b) 4800 (c) 9600 (d) 48000
36. 36.₹53.05 + ₹14.25 =
37. 37.5 + 2 + 4 + 8 + 9 =
38. 38.59² =
39. 39.10% of 240 =
40. 40.89² =

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