Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 563 · 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: 46 × 16 = 736. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 90 × 93 = 8377. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 678 + 214 = 892. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 273 + 127 = 400. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 44 × 63 = 2772. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 75 × 74 = 5550. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 60 × 90 = 5406. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 76 × 84 = 6382. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 653 + 863 = 1513. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 23 × 67 = 1549. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 69 × 73 = 5037. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 63 × 12 = 756. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 597 + 728 = 1325. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 34 × 49 = 1659. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 832 + 959 = 1791. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 498 + 856 = 1346. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 22 × 59 = 1298. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 26 × 95 = 2470. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 290 + 285 = 569. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 93 × 18 = 1678. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 35 × 57 = 2002. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 822 + 921 = 1746. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 284 + 758 = 1048. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 24 × 58 = 1388. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 235 + 795 = 1030. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 52 × 76 = 3953. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 904 + 651 = 1562. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 938 + 181 = 1124. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 16 × 14 = 224. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 22 × 43 = 946. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 920 + 958 = 1878. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 309 + 625 = 930. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 62 × 79 = 4898. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 974 + 751 = 1733. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 13 × 99 = 1287. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 661 + 746 = 1410. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 27 × 33 = 896. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 63 × 14 = 882. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 703 + 466 = 1169. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 935 + 889 = 1824. Correct or wrong? (a) correct (b) wrong

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