Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 643 · 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: 420 + 225 = 640. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 40 × 19 = 767. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 82 × 84 = 6888. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 12 × 78 = 936. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 891 + 835 = 1732. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 40 × 39 = 1560. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 149 + 929 = 1078. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 839 + 831 = 1670. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 228 + 219 = 447. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 969 + 706 = 1675. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 97 × 55 = 5335. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 515 + 581 = 1092. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 24 × 49 = 1177. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 868 + 859 = 1722. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 52 × 24 = 1248. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 95 × 74 = 7037. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 75 × 62 = 4650. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 92 × 99 = 9108. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 93 × 19 = 1774. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 86 × 20 = 1718. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 55 × 20 = 1100. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 46 × 21 = 972. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 33 × 74 = 2444. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 73 × 83 = 6060. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 29 × 80 = 2322. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 31 × 37 = 1142. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 45 × 83 = 3736. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 689 + 425 = 1114. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 142 + 424 = 566. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 57 × 64 = 3651. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 373 + 503 = 878. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 800 + 370 = 1170. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 822 + 544 = 1366. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 308 + 239 = 547. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 525 + 329 = 854. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 405 + 641 = 1044. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 547 + 258 = 805. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 88 × 98 = 8619. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 16 × 79 = 1264. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 48 × 27 = 1292. Correct or wrong? (a) wrong (b) correct

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths