Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 175 · 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. 1.87 + 58 + 38 + 86 =
2. 2.Check with nines: 350 + 398 = 740. Correct or wrong? (a) correct (b) wrong
3. 3.46 × 8 =
4. 4.Best estimate of 51 × 31? (a) 1500 (b) 3000 (c) 15000 (d) 150
5. 5.25% of 80 =
6. 6.39² =
7. 7.33 × 5 =
8. 8.75 ÷ 25 =
9. 9.22 × 15 =
10. 10.80 × 5 =
11. 11.1 + 6 + 6 + 9 + 4 =
12. 12.395 + 67 =
13. 13.537 − 36 =
14. 14.Check with nines: 397 + 468 = 865. Correct or wrong? (a) wrong (b) correct
15. 15.43 × 15 =
16. 16.18 + 87 + 27 + 69 =
17. 17.Best estimate of 797 × 9? (a) 720 (b) 7200 (c) 14400 (d) 72000
18. 18.18 × 14 =
19. 19.Check with nines: 602 + 768 = 1370. Correct or wrong? (a) correct (b) wrong
20. 20.41 × 15 =
21. 21.48 × 5 =
22. 22.18 × 14 =
23. 23.14 × 15 =
24. 24.393 + 47 =
25. 25.79² =
26. 26.102 − 98 =
27. 27.₹32.85 − ₹19.85 =
28. 28.63 × 5 =
29. 29.Check with nines: 36 × 28 = 1015. Correct or wrong? (a) wrong (b) correct
30. 30.Best estimate of 797 × 4? (a) 320 (b) 32000 (c) 6400 (d) 3200
31. 31.2 + 9 + 4 + 8 + 2 =
32. 32.31² =
33. 33.13 × 15 =
34. 34.25% of 200 =
35. 35.₹36.65 − ₹5.75 =
36. 36.₹78.20 − ₹27.60 =
37. 37.Check with nines: 20 × 87 = 1740. Correct or wrong? (a) wrong (b) correct
38. 38.12 × 17 =
39. 39.89² =
40. 40.53 × 4 =

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