Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 481 · 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: 275 + 177 = 452. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 279 + 827 = 1108. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 902 + 355 = 1257. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 98 × 73 = 7158. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 84 × 55 = 4620. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 89 × 54 = 4801. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 93 × 36 = 3348. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 55 × 35 = 1918. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 361 + 929 = 1290. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 66 × 14 = 924. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 689 + 752 = 1437. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 40 × 23 = 924. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 86 × 41 = 3526. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 447 + 241 = 688. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 52 × 41 = 2133. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 20 × 49 = 985. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 747 + 352 = 1099. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 422 + 293 = 710. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 16 × 39 = 631. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 625 + 181 = 805. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 23 × 65 = 1493. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 867 + 630 = 1491. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 85 × 17 = 1445. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 16 × 34 = 542. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 71 × 71 = 5041. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 324 + 144 = 471. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 231 + 246 = 481. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 59 × 75 = 4425. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 28 × 26 = 728. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 57 × 92 = 5245. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 15 × 33 = 495. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 51 × 59 = 3014. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 127 + 813 = 940. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 19 × 91 = 1731. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 45 × 89 = 4005. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 851 + 681 = 1540. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 561 + 599 = 1160. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 90 × 97 = 8730. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 904 + 904 = 1811. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 16 × 50 = 800. Correct or wrong? (a) wrong (b) correct

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