Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 728 · 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: 68 × 79 = 5372. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 71 × 31 = 2201. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 47 × 58 = 2726. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 880 + 600 = 1480. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 232 + 962 = 1199. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 15 × 17 = 263. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 34 × 61 = 2069. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 80 × 85 = 6800. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 58 × 58 = 3364. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 72 × 92 = 6629. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 80 × 95 = 7596. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 40 × 57 = 2280. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 18 × 22 = 396. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 95 × 80 = 7607. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 74 × 82 = 6062. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 27 × 57 = 1539. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 63 × 13 = 819. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 84 × 39 = 3270. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 25 × 42 = 1052. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 93 × 44 = 4092. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 212 + 501 = 713. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 59 × 51 = 3014. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 64 × 82 = 5248. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 294 + 325 = 619. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 50 × 37 = 1853. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 508 + 326 = 834. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 137 + 241 = 378. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 17 × 75 = 1273. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 89 × 48 = 4272. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 55 × 93 = 5117. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 215 + 235 = 450. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 955 + 540 = 1495. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 24 × 15 = 360. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 26 × 55 = 1428. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 688 + 874 = 1562. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 60 × 93 = 5584. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 76 × 78 = 5928. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 206 + 931 = 1135. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 185 + 459 = 644. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 50 × 82 = 4100. Correct or wrong? (a) wrong (b) correct

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