Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 906 · 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: 202 + 412 = 614. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 592 + 804 = 1394. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 70 × 33 = 2310. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 86 × 67 = 5762. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 16 × 92 = 1473. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 35 × 47 = 1652. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 68 × 43 = 2924. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 13 × 12 = 156. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 52 × 39 = 2029. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 57 × 41 = 2333. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 22 × 19 = 418. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 466 + 294 = 756. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 251 + 380 = 639. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 71 × 28 = 1988. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 209 + 130 = 339. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 87 × 69 = 6003. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 280 + 224 = 504. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 63 × 22 = 1386. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 403 + 203 = 606. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 35 × 92 = 3227. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 59 × 54 = 3183. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 22 × 22 = 491. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 618 + 825 = 1443. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 80 × 74 = 5920. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 94 × 96 = 9024. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 18 × 20 = 360. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 66 × 21 = 1385. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 72 × 75 = 5405. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 41 × 24 = 984. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 738 + 268 = 1005. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 97 × 64 = 6208. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 97 × 40 = 3880. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 386 + 348 = 734. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 767 + 431 = 1198. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 339 + 275 = 614. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 213 + 906 = 1119. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 434 + 151 = 585. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 627 + 309 = 936. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 32 × 17 = 546. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 36 × 46 = 1650. Correct or wrong? (a) correct (b) wrong

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