Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 185 · 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: 24 × 63 = 1516. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 873 + 675 = 1548. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 46 × 99 = 4557. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 619 + 845 = 1464. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 44 × 59 = 2602. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 57 × 52 = 2964. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 624 + 249 = 879. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 59 × 86 = 5074. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 58 × 24 = 1392. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 694 + 369 = 1063. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 84 × 38 = 3195. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 450 + 763 = 1213. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 15 × 60 = 900. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 898 + 532 = 1430. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 98 × 85 = 8330. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 63 × 44 = 2772. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 60 × 37 = 2220. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 788 + 971 = 1759. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 75 × 83 = 6220. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 59 × 73 = 4307. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 686 + 572 = 1258. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 154 + 354 = 508. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 33 × 28 = 924. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 53 × 55 = 2915. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 592 + 705 = 1305. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 43 × 71 = 3048. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 924 + 471 = 1394. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 94 × 96 = 9024. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 66 × 43 = 2840. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 96 × 98 = 9408. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 277 + 596 = 873. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 826 + 836 = 1662. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 423 + 160 = 581. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 857 + 676 = 1533. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 359 + 153 = 507. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 550 + 147 = 702. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 24 × 35 = 843. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 414 + 941 = 1353. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 64 × 37 = 2368. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 68 × 62 = 4222. Correct or wrong? (a) wrong (b) correct

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