Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 555 · 40 questions

The fast method (Casting out nines): Find the nine-check number of each number: add the digits until one digit is left. Do the same sum (× or +) with those digits and shrink the result to one digit too. Shrink the given answer. Different → wrong. Same → it passes the check.

1. 1.Check with nines: 61 × 71 = 4331. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 145 + 828 = 973. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 640 + 256 = 901. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 592 + 767 = 1359. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 78 × 49 = 3822. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 66 × 41 = 2699. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 706 + 526 = 1232. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 92 × 44 = 4048. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 83 × 90 = 7476. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 40 × 76 = 3045. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 54 × 92 = 4968. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 693 + 260 = 951. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 48 × 63 = 3024. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 98 × 78 = 7652. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 22 × 32 = 704. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 91 × 38 = 3452. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 49 × 26 = 1267. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 208 + 657 = 863. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 35 × 89 = 3115. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 545 + 840 = 1385. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 62 × 42 = 2604. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 747 + 776 = 1523. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 42 × 36 = 1512. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 71 × 70 = 4970. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 81 × 93 = 7529. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 243 + 588 = 835. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 397 + 938 = 1343. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 20 × 85 = 1700. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 610 + 251 = 861. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 932 + 365 = 1292. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 859 + 719 = 1579. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 79 × 96 = 7584. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 56 × 47 = 2627. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 51 × 24 = 1224. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 92 × 85 = 7820. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 75 × 67 = 5033. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 804 + 505 = 1311. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 88 × 60 = 5280. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 53 × 56 = 2968. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 67 × 34 = 2278. Correct or wrong? (a) wrong (b) correct

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths