Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 358 · 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: 41 × 38 = 1559. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 42 × 50 = 2093. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 58 × 77 = 4466. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 87 × 19 = 1653. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 214 + 356 = 570. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 80 × 25 = 2006. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 31 × 36 = 1116. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 20 × 21 = 425. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 70 × 93 = 6510. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 780 + 590 = 1373. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 181 + 559 = 737. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 852 + 134 = 986. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 19 × 86 = 1634. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 24 × 21 = 504. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 81 × 59 = 4773. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 68 × 19 = 1292. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 84 × 72 = 6048. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 65 × 92 = 5980. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 28 × 22 = 616. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 769 + 336 = 1105. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 31 × 59 = 1829. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 92 × 88 = 8096. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 191 + 188 = 379. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 24 × 55 = 1320. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 979 + 274 = 1253. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 18 × 53 = 947. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 88 × 74 = 6512. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 21 × 73 = 1533. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 40 × 31 = 1240. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 750 + 288 = 1038. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 66 × 72 = 4753. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 17 × 31 = 527. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 80 × 68 = 5442. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 30 × 78 = 2343. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 848 + 129 = 977. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 444 + 868 = 1304. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 489 + 133 = 621. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 706 + 692 = 1398. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 613 + 382 = 997. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 30 × 35 = 1056. Correct or wrong? (a) wrong (b) correct

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