Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 866 · 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.Best estimate of 32 × 72? (a) 4200 (b) 2100 (c) 210 (d) 21000
2. 2.Check with nines: 42 × 27 = 1134. Correct or wrong? (a) correct (b) wrong
3. 3.3 + 3 + 7 + 5 + 1 =
4. 4.25% of 120 =
5. 5.399 + 49 =
6. 6.835 ÷ 5 =
7. 7.₹89.70 − ₹36.80 =
8. 8.346 + 87 =
9. 9.291 − 18 =
10. 10.Best estimate of 79 × 89? (a) 14400 (b) 720 (c) 7200 (d) 72000
11. 11.Best estimate of 199 × 4? (a) 8000 (b) 1600 (c) 80 (d) 800
12. 12.33 × 15 =
13. 13.202 + 89 =
14. 14.15% of 280 =
15. 15.240 ÷ 5 =
16. 16.61² =
17. 17.22 + 40 + 61 + 38 =
18. 18.94 × 4 =
19. 19.630 ÷ 5 =
20. 20.Best estimate of 81 × 31? (a) 4800 (b) 2400 (c) 24000 (d) 240
21. 21.₹21.15 − ₹20.10 =
22. 22.11 × 18 =
23. 23.12 × 5 =
24. 24.4 + 1 + 9 + 6 =
25. 25.91² =
26. 26.235 − 77 =
27. 27.19 × 12 =
28. 28.13 × 50 =
29. 29.800 ÷ 50 =
30. 30.27 + 68 + 68 + 21 =
31. 31.Check with nines: 664 + 697 = 1361. Correct or wrong? (a) wrong (b) correct
32. 32.273 + 67 =
33. 33.Best estimate of 69 × 22? (a) 140 (b) 1400 (c) 2800 (d) 14000
34. 34.19 × 15 =
35. 35.19² =
36. 36.95 × 5 =
37. 37.434 − 29 =
38. 38.13 × 11 =
39. 39.14 × 17 =
40. 40.28 × 15 =

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