Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 177 · 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. 1.22 × 8 =
2. 2.Best estimate of 89 × 91? (a) 810 (b) 81000 (c) 8100 (d) 16200
3. 3.59² =
4. 4.39² =
5. 5.114 + 89 =
6. 6.₹20.90 + ₹48.25 =
7. 7.21 × 8 =
8. 8.50% of 150 =
9. 9.41² =
10. 10.33 + 22 + 86 + 89 =
11. 11.29² =
12. 12.12 × 19 =
13. 13.25% of 400 =
14. 14.21² =
15. 15.3 + 3 + 9 + 7 =
16. 16.Best estimate of 51 × 38? (a) 4000 (b) 200 (c) 2000 (d) 20000
17. 17.72 + 79 =
18. 18.65 × 5 =
19. 19.9 + 3 + 8 + 1 + 8 =
20. 20.500 ÷ 50 =
21. 21.Check with nines: 577 + 803 = 1387. Correct or wrong? (a) correct (b) wrong
22. 22.29² =
23. 23.Check with nines: 316 + 209 = 525. Correct or wrong? (a) wrong (b) correct
24. 24.2 + 2 + 2 + 8 =
25. 25.11 × 15 =
26. 26.57 × 4 =
27. 27.1 + 5 + 4 + 9 =
28. 28.149 × 4 =
29. 29.139 × 4 =
30. 30.207 + 99 =
31. 31.421 + 27 =
32. 32.49 × 8 =
33. 33.Best estimate of 28 × 91? (a) 270 (b) 2700 (c) 27000 (d) 5400
34. 34.386 + 98 =
35. 35.10% of 120 =
36. 36.24 + 87 + 28 + 39 =
37. 37.₹34.25 − ₹9.15 =
38. 38.339 + 18 =
39. 39.₹18.15 + ₹42.40 =
40. 40.50 × 50 =

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