Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 269 · 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: 92 × 62 = 5704. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 158 + 502 = 660. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 76 × 96 = 7293. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 400 + 618 = 1012. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 41 × 93 = 3820. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 32 × 84 = 2688. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 929 + 626 = 1555. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 53 × 35 = 1855. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 754 + 807 = 1561. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 44 × 46 = 2017. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 82 × 48 = 3936. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 93 × 28 = 2605. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 375 + 920 = 1300. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 812 + 690 = 1502. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 792 + 679 = 1471. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 426 + 245 = 671. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 444 + 604 = 1048. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 344 + 154 = 504. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 78 × 23 = 1794. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 267 + 678 = 945. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 571 + 513 = 1088. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 268 + 920 = 1188. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 396 + 523 = 919. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 333 + 644 = 978. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 32 × 21 = 672. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 901 + 469 = 1370. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 69 × 82 = 5658. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 92 × 46 = 4229. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 305 + 492 = 797. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 13 × 52 = 676. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 40 × 87 = 3480. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 62 × 96 = 5952. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 864 + 930 = 1792. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 933 + 949 = 1885. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 87 × 20 = 1738. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 377 + 542 = 919. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 143 + 220 = 362. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 46 × 15 = 690. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 27 × 43 = 1161. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 44 × 30 = 1323. Correct or wrong? (a) wrong (b) correct

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