Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 827 · 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: 946 + 593 = 1537. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 60 × 42 = 2512. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 565 + 786 = 1356. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 14 × 69 = 966. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 527 + 231 = 763. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 303 + 863 = 1160. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 72 × 68 = 4904. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 55 × 72 = 3960. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 949 + 732 = 1682. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 381 + 641 = 1022. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 22 × 49 = 1085. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 90 × 76 = 6848. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 968 + 926 = 1894. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 406 + 452 = 858. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 276 + 565 = 841. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 33 × 37 = 1222. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 54 × 82 = 4428. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 385 + 850 = 1235. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 41 × 17 = 691. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 259 + 650 = 909. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 521 + 589 = 1105. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 915 + 338 = 1253. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 12 × 56 = 667. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 382 + 592 = 981. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 90 × 85 = 7650. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 313 + 504 = 818. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 302 + 984 = 1293. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 223 + 355 = 578. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 39 × 20 = 780. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 22 × 33 = 726. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 769 + 987 = 1756. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 46 × 34 = 1571. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 88 × 43 = 3789. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 177 + 985 = 1162. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 42 × 27 = 1134. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 91 × 81 = 7377. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 20 × 15 = 300. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 665 + 176 = 841. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 20 × 47 = 940. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 41 × 16 = 656. Correct or wrong? (a) correct (b) wrong

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