Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 466 · 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: 96 × 48 = 4608. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 54 × 19 = 1026. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 94 × 46 = 4326. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 26 × 61 = 1586. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 485 + 521 = 1006. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 39 × 57 = 2219. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 631 + 603 = 1234. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 62 × 43 = 2666. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 68 × 46 = 3128. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 44 × 52 = 2294. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 62 × 95 = 5888. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 50 × 24 = 1208. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 44 × 98 = 4312. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 77 × 48 = 3704. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 26 × 90 = 2337. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 53 × 97 = 5141. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 781 + 140 = 916. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 514 + 193 = 714. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 453 + 764 = 1214. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 31 × 24 = 744. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 497 + 757 = 1254. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 67 × 22 = 1474. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 142 + 748 = 890. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 78 × 22 = 1720. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 193 + 127 = 324. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 571 + 293 = 872. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 663 + 209 = 868. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 91 × 13 = 1188. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 988 + 343 = 1331. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 650 + 737 = 1387. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 714 + 323 = 1033. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 851 + 395 = 1246. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 62 × 87 = 5394. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 75 × 23 = 1722. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 73 × 13 = 945. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 26 × 87 = 2262. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 625 + 243 = 868. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 686 + 283 = 976. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 226 + 697 = 929. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 577 + 519 = 1096. Correct or wrong? (a) wrong (b) correct

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