Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 483 · 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. 1.353 − 28 =
2. 2.₹68.55 + ₹12.45 =
3. 3.₹5.15 + ₹31.40 =
4. 4.Best estimate of 699 × 8? (a) 5600 (b) 560 (c) 11200 (d) 56000
5. 5.172 + 98 =
6. 6.15 × 11 =
7. 7.20% of 110 =
8. 8.61² =
9. 9.1 + 5 + 5 + 8 + 3 =
10. 10.17 × 19 =
11. 11.₹87.95 − ₹8.65 =
12. 12.₹39.75 − ₹9.05 =
13. 13.121 + 29 =
14. 14.775 ÷ 5 =
15. 15.Check with nines: 269 + 698 = 969. Correct or wrong? (a) wrong (b) correct
16. 16.Best estimate of 49 × 42? (a) 20000 (b) 4000 (c) 2000 (d) 200
17. 17.11 + 17 + 79 + 79 =
18. 18.₹62.35 + ₹14.05 =
19. 19.155 + 49 =
20. 20.43 × 15 =
21. 21.₹91.05 − ₹37.60 =
22. 22.25% of 770 =
23. 23.10% of 510 =
24. 24.50% of 860 =
25. 25.Check with nines: 56 × 35 = 1960. Correct or wrong? (a) correct (b) wrong
26. 26.91² =
27. 27.91 × 50 =
28. 28.Best estimate of 68 × 19? (a) 140 (b) 14000 (c) 2800 (d) 1400
29. 29.163 − 78 =
30. 30.1 + 3 + 9 + 9 =
31. 31.Check with nines: 243 + 973 = 1220. Correct or wrong? (a) correct (b) wrong
32. 32.83 + 21 + 36 + 21 =
33. 33.56 − 19 =
34. 34.57 + 60 + 25 + 49 =
35. 35.573 − 37 =
36. 36.71² =
37. 37.6 + 7 + 3 + 9 + 3 =
38. 38.2 + 2 + 8 + 8 + 1 =
39. 39.69 × 5 =
40. 40.13 × 17 =

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