Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 992 · 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 69 × 41? (a) 28000 (b) 280 (c) 5600 (d) 2800
2. 2.84 × 5 =
3. 3.105 − 97 =
4. 4.Best estimate of 18 × 32? (a) 60 (b) 6000 (c) 1200 (d) 600
5. 5.44 × 15 =
6. 6.76 + 20 + 39 + 50 =
7. 7.39² =
8. 8.Best estimate of 403 × 5? (a) 20000 (b) 4000 (c) 2000 (d) 200
9. 9.Check with nines: 170 + 207 = 375. Correct or wrong? (a) correct (b) wrong
10. 10.9 + 1 + 3 + 3 =
11. 11.103 + 88 =
12. 12.79² =
13. 13.541 − 47 =
14. 14.106 − 56 =
15. 15.439 + 77 =
16. 16.₹45.60 − ₹35.55 =
17. 17.77 × 4 =
18. 18.80 + 76 + 47 + 69 =
19. 19.73 + 78 =
20. 20.72 × 50 =
21. 21.47 × 15 =
22. 22.2 + 8 + 6 + 9 + 8 =
23. 23.Best estimate of 398 × 3? (a) 120 (b) 2400 (c) 1200 (d) 12000
24. 24.₹71.15 − ₹41.85 =
25. 25.Check with nines: 894 + 680 = 1571. Correct or wrong? (a) correct (b) wrong
26. 26.42 × 15 =
27. 27.37 × 8 =
28. 28.20% of 320 =
29. 29.Check with nines: 52 × 14 = 728. Correct or wrong? (a) wrong (b) correct
30. 30.43 × 15 =
31. 31.71² =
32. 32.70 × 8 =
33. 33.20 × 8 =
34. 34.28 + 35 + 65 + 76 =
35. 35.16 × 15 =
36. 36.19 × 19 =
37. 37.12 × 11 =
38. 38.89 + 29 + 11 + 60 =
39. 39.93 × 5 =
40. 40.17 + 26 + 39 + 15 =

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