Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 771 · 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: 38 × 25 = 946. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 174 + 183 = 362. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 32 × 92 = 2944. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 93 × 80 = 7441. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 22 × 43 = 940. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 89 × 61 = 5429. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 737 + 897 = 1634. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 57 × 18 = 1032. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 747 + 125 = 878. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 322 + 403 = 725. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 955 + 874 = 1829. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 520 + 743 = 1264. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 82 × 24 = 1968. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 366 + 396 = 762. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 527 + 552 = 1072. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 26 × 41 = 1066. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 24 × 30 = 719. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 579 + 458 = 1037. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 126 + 491 = 617. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 57 × 62 = 3541. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 24 × 75 = 1800. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 40 × 60 = 2398. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 66 × 98 = 6468. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 607 + 411 = 1011. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 746 + 874 = 1613. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 70 × 26 = 1820. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 35 × 98 = 3428. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 26 × 82 = 2132. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 426 + 669 = 1103. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 24 × 66 = 1584. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 407 + 875 = 1282. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 482 + 299 = 781. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 38 × 94 = 3577. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 147 + 569 = 716. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 93 × 99 = 9207. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 491 + 345 = 836. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 795 + 309 = 1104. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 92 × 92 = 8464. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 51 × 30 = 1530. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 17 × 73 = 1241. Correct or wrong? (a) correct (b) wrong

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