Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 959 · 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.Check with nines: 32 × 36 = 1148. Correct or wrong? (a) correct (b) wrong
2. 2.50% of 140 =
3. 3.370 + 39 =
4. 4.Best estimate of 28 × 78? (a) 4800 (b) 2400 (c) 24000 (d) 240
5. 5.25% of 860 =
6. 6.23 × 4 =
7. 7.Check with nines: 44 × 82 = 3609. Correct or wrong? (a) correct (b) wrong
8. 8.407 + 29 =
9. 9.Best estimate of 68 × 29? (a) 210 (b) 21000 (c) 4200 (d) 2100
10. 10.₹96.30 − ₹5.65 =
11. 11.18 × 17 =
12. 12.15 × 11 =
13. 13.14 × 14 =
14. 14.362 + 87 =
15. 15.Best estimate of 197 × 8? (a) 16000 (b) 3200 (c) 160 (d) 1600
16. 16.7 + 1 + 3 + 3 + 3 =
17. 17.42 + 41 + 25 + 43 =
18. 18.60 − 26 =
19. 19.Best estimate of 21 × 18? (a) 800 (b) 4000 (c) 400 (d) 40
20. 20.15% of 610 =
21. 21.122 × 4 =
22. 22.29² =
23. 23.10 × 15 =
24. 24.₹37.70 − ₹20.40 =
25. 25.61² =
26. 26.251 + 38 =
27. 27.₹58.55 − ₹22.20 =
28. 28.4 + 2 + 5 + 5 + 1 =
29. 29.123 + 68 =
30. 30.529 − 18 =
31. 31.32 + 77 + 25 + 40 =
32. 32.1% of 80 =
33. 33.Best estimate of 82 × 38? (a) 6400 (b) 32000 (c) 3200 (d) 320
34. 34.6 + 1 + 4 + 5 + 9 =
35. 35.39² =
36. 36.335 − 29 =
37. 37.268 + 89 =
38. 38.26 × 8 =
39. 39.Best estimate of 29 × 62? (a) 180 (b) 3600 (c) 1800 (d) 18000
40. 40.Best estimate of 19 × 71? (a) 14000 (b) 1400 (c) 140 (d) 2800

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