Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 81 · 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. 1.56 + 31 + 57 + 87 =
2. 2.450 ÷ 25 =
3. 3.242 + 67 =
4. 4.89 + 50 + 37 + 88 =
5. 5.79² =
6. 6.9 + 9 + 1 + 3 + 1 =
7. 7.7 + 1 + 2 + 9 =
8. 8.94 × 4 =
9. 9.Check with nines: 34 × 19 = 640. Correct or wrong? (a) correct (b) wrong
10. 10.₹36.80 + ₹2.85 =
11. 11.Best estimate of 49 × 91? (a) 9000 (b) 450 (c) 45000 (d) 4500
12. 12.Check with nines: 72 × 38 = 2736. Correct or wrong? (a) wrong (b) correct
13. 13.92 + 39 =
14. 14.50% of 710 =
15. 15.11 + 79 + 25 + 47 =
16. 16.Best estimate of 901 × 5? (a) 45000 (b) 450 (c) 9000 (d) 4500
17. 17.83 × 4 =
18. 18.10% of 460 =
19. 19.17 × 8 =
20. 20.1300 ÷ 50 =
21. 21.55 × 4 =
22. 22.529 − 17 =
23. 23.Best estimate of 28 × 68? (a) 21000 (b) 4200 (c) 210 (d) 2100
24. 24.₹91.20 − ₹48.70 =
25. 25.51² =
26. 26.18 × 12 =
27. 27.110 × 4 =
28. 28.556 − 76 =
29. 29.₹58.20 − ₹32.95 =
30. 30.665 ÷ 5 =
31. 31.16 × 18 =
32. 32.23 × 50 =
33. 33.47 × 50 =
34. 34.362 − 46 =
35. 35.Best estimate of 499 × 9? (a) 450 (b) 4500 (c) 45000 (d) 9000
36. 36.₹10.80 − ₹7.90 =
37. 37.16 × 14 =
38. 38.41 × 15 =
39. 39.Check with nines: 566 + 166 = 732. Correct or wrong? (a) wrong (b) correct
40. 40.1150 ÷ 25 =

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