Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 63 · 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 38 × 81? (a) 6400 (b) 32000 (c) 320 (d) 3200
2. 2.71² =
3. 3.Best estimate of 48 × 58? (a) 300 (b) 6000 (c) 3000 (d) 30000
4. 4.19 × 12 =
5. 5.₹62.75 − ₹36.75 =
6. 6.72 + 29 + 70 + 84 =
7. 7.61 × 8 =
8. 8.475 ÷ 25 =
9. 9.25 × 50 =
10. 10.75 × 50 =
11. 11.Check with nines: 60 × 52 = 3126. Correct or wrong? (a) correct (b) wrong
12. 12.471 + 29 =
13. 13.19² =
14. 14.24 × 4 =
15. 15.₹57.35 − ₹5.95 =
16. 16.₹7.70 − ₹4.75 =
17. 17.14 × 19 =
18. 18.Check with nines: 13 × 56 = 726. Correct or wrong? (a) wrong (b) correct
19. 19.25% of 390 =
20. 20.42 × 5 =
21. 21.36 × 4 =
22. 22.16 × 18 =
23. 23.7 + 8 + 3 + 3 =
24. 24.Best estimate of 31 × 18? (a) 1200 (b) 60 (c) 600 (d) 6000
25. 25.Check with nines: 28 × 77 = 2154. Correct or wrong? (a) correct (b) wrong
26. 26.50% of 860 =
27. 27.43 × 5 =
28. 28.₹10.95 + ₹2.25 =
29. 29.98 + 98 =
30. 30.14 × 18 =
31. 31.62 × 4 =
32. 32.₹99.10 − ₹40.75 =
33. 33.240 − 66 =
34. 34.388 − 69 =
35. 35.Check with nines: 185 + 174 = 359. Correct or wrong? (a) correct (b) wrong
36. 36.Best estimate of 78 × 62? (a) 4800 (b) 48000 (c) 9600 (d) 480
37. 37.Best estimate of 81 × 38? (a) 3200 (b) 32000 (c) 320 (d) 6400
38. 38.35 × 50 =
39. 39.72 − 68 =
40. 40.465 ÷ 5 =

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