Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 209 · 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.₹85.65 − ₹17.80 =
2. 2.122 − 57 =
3. 3.14 × 8 =
4. 4.39 + 40 + 11 + 55 =
5. 5.46 × 15 =
6. 6.₹25.50 + ₹38.75 =
7. 7.268 − 47 =
8. 8.1250 ÷ 50 =
9. 9.8 + 6 + 9 + 4 =
10. 10.₹6.60 + ₹19.65 =
11. 11.Best estimate of 19 × 38? (a) 8000 (b) 80 (c) 800 (d) 1600
12. 12.23 × 8 =
13. 13.543 − 87 =
14. 14.186 − 48 =
15. 15.87 + 14 + 51 + 77 =
16. 16.3 + 8 + 4 + 7 =
17. 17.Check with nines: 162 + 606 = 767. Correct or wrong? (a) wrong (b) correct
18. 18.62 + 20 + 48 + 30 =
19. 19.5% of 160 =
20. 20.213 − 18 =
21. 21.78 × 4 =
22. 22.₹22.05 + ₹6.85 =
23. 23.Best estimate of 91 × 19? (a) 180 (b) 1800 (c) 18000 (d) 3600
24. 24.21 × 5 =
25. 25.1 + 2 + 5 + 7 + 9 =
26. 26.50% of 130 =
27. 27.11 × 11 =
28. 28.7 × 15 =
29. 29.Check with nines: 427 + 551 = 982. Correct or wrong? (a) correct (b) wrong
30. 30.19 × 19 =
31. 31.Best estimate of 38 × 31? (a) 1200 (b) 12000 (c) 2400 (d) 120
32. 32.481 − 97 =
33. 33.₹43.55 − ₹11.10 =
34. 34.Check with nines: 16 × 26 = 414. Correct or wrong? (a) correct (b) wrong
35. 35.69² =
36. 36.72 × 5 =
37. 37.27 × 15 =
38. 38.6 × 15 =
39. 39.900 ÷ 5 =
40. 40.54 × 4 =

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