Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 284 · 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. 1.14 × 15 =
2. 2.85 + 66 + 66 + 11 =
3. 3.Best estimate of 897 × 7? (a) 12600 (b) 630 (c) 6300 (d) 63000
4. 4.21² =
5. 5.Check with nines: 587 + 684 = 1271. Correct or wrong? (a) wrong (b) correct
6. 6.14 × 12 =
7. 7.315 − 39 =
8. 8.96 − 56 =
9. 9.503 − 79 =
10. 10.350 ÷ 50 =
11. 11.Check with nines: 647 + 315 = 958. Correct or wrong? (a) wrong (b) correct
12. 12.9 × 15 =
13. 13.Check with nines: 43 × 46 = 1978. Correct or wrong? (a) correct (b) wrong
14. 14.136 − 56 =
15. 15.51² =
16. 16.219 − 88 =
17. 17.13 × 15 =
18. 18.Check with nines: 701 + 408 = 1109. Correct or wrong? (a) wrong (b) correct
19. 19.2 + 6 + 9 + 8 =
20. 20.Best estimate of 397 × 7? (a) 5600 (b) 28000 (c) 2800 (d) 280
21. 21.65 ÷ 5 =
22. 22.71 + 37 + 32 + 11 =
23. 23.55 × 15 =
24. 24.42 × 8 =
25. 25.47 × 15 =
26. 26.424 − 26 =
27. 27.5% of 60 =
28. 28.₹97.40 − ₹12.05 =
29. 29.127 + 57 =
30. 30.₹71.05 − ₹41.05 =
31. 31.₹74.40 + ₹36.80 =
32. 32.Best estimate of 399 × 5? (a) 4000 (b) 20000 (c) 200 (d) 2000
33. 33.Check with nines: 398 + 379 = 777. Correct or wrong? (a) wrong (b) correct
34. 34.64 + 19 =
35. 35.Best estimate of 798 × 3? (a) 2400 (b) 24000 (c) 240 (d) 4800
36. 36.3 + 4 + 7 + 7 + 1 =
37. 37.540 ÷ 5 =
38. 38.189 − 58 =
39. 39.423 + 89 =
40. 40.50 × 15 =

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