Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 583 · 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: 555 + 276 = 838. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 578 + 728 = 1306. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 26 × 88 = 2288. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 14 × 19 = 266. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 46 × 22 = 1012. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 51 × 31 = 1589. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 27 × 65 = 1755. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 784 + 434 = 1218. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 98 × 73 = 7159. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 470 + 433 = 901. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 62 × 12 = 744. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 75 × 44 = 3300. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 380 + 292 = 672. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 91 × 75 = 6823. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 598 + 266 = 867. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 56 × 16 = 896. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 80 × 18 = 1445. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 18 × 28 = 504. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 881 + 928 = 1809. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 383 + 181 = 564. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 48 × 65 = 3120. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 95 × 70 = 6654. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 95 × 31 = 2952. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 576 + 620 = 1196. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 168 + 523 = 691. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 417 + 352 = 765. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 95 × 74 = 7030. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 325 + 599 = 924. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 54 × 17 = 915. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 840 + 169 = 1009. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 64 × 82 = 5251. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 84 × 22 = 1848. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 586 + 866 = 1456. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 260 + 738 = 1006. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 986 + 161 = 1152. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 55 × 45 = 2475. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 65 × 17 = 1102. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 140 + 805 = 945. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 652 + 323 = 975. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 47 × 35 = 1645. Correct or wrong? (a) correct (b) wrong

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