Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 114 · 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. 1.347 + 17 =
2. 2.10% of 540 =
3. 3.46 × 50 =
4. 4.7 + 1 + 9 + 5 =
5. 5.30 × 15 =
6. 6.14 × 14 =
7. 7.Check with nines: 18 × 33 = 597. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 759 + 816 = 1570. Correct or wrong? (a) correct (b) wrong
9. 9.700 ÷ 25 =
10. 10.Best estimate of 798 × 8? (a) 12800 (b) 640 (c) 64000 (d) 6400
11. 11.1 + 7 + 2 + 2 + 8 =
12. 12.147 + 47 =
13. 13.Check with nines: 25 × 40 = 1006. Correct or wrong? (a) wrong (b) correct
14. 14.9 + 4 + 6 + 6 =
15. 15.Check with nines: 72 × 21 = 1512. Correct or wrong? (a) correct (b) wrong
16. 16.126 × 4 =
17. 17.₹46.40 + ₹44.70 =
18. 18.208 + 28 =
19. 19.32 × 15 =
20. 20.75 + 54 + 76 + 18 =
21. 21.75 × 8 =
22. 22.35 × 4 =
23. 23.72 + 15 + 33 + 35 =
24. 24.Best estimate of 39 × 78? (a) 3200 (b) 6400 (c) 32000 (d) 320
25. 25.101 × 4 =
26. 26.402 − 67 =
27. 27.Check with nines: 654 + 909 = 1563. Correct or wrong? (a) wrong (b) correct
28. 28.225 + 88 =
29. 29.32 × 50 =
30. 30.Check with nines: 188 + 614 = 809. Correct or wrong? (a) correct (b) wrong
31. 31.Best estimate of 701 × 6? (a) 4200 (b) 8400 (c) 420 (d) 42000
32. 32.365 + 48 =
33. 33.530 − 69 =
34. 34.8 + 8 + 1 + 2 + 2 =
35. 35.Best estimate of 499 × 9? (a) 4500 (b) 9000 (c) 450 (d) 45000
36. 36.479 + 27 =
37. 37.Check with nines: 32 × 92 = 2944. Correct or wrong? (a) correct (b) wrong
38. 38.22 × 15 =
39. 39.Best estimate of 198 × 4? (a) 800 (b) 8000 (c) 80 (d) 1600
40. 40.Check with nines: 42 × 67 = 2807. Correct or wrong? (a) wrong (b) correct

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