Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 287 · 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: 677 + 712 = 1383. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 948 + 876 = 1822. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 83 × 41 = 3403. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 36 × 63 = 2268. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 76 × 44 = 3347. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 777 + 258 = 1035. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 66 × 58 = 3823. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 773 + 563 = 1336. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 31 × 30 = 930. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 48 × 41 = 1968. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 236 + 761 = 1003. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 455 + 138 = 591. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 959 + 321 = 1280. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 30 × 48 = 1439. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 62 × 23 = 1426. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 90 × 85 = 7652. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 565 + 305 = 870. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 94 × 34 = 3196. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 674 + 120 = 794. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 800 + 991 = 1797. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 292 + 518 = 812. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 64 × 27 = 1728. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 589 + 322 = 911. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 21 × 35 = 735. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 419 + 304 = 723. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 585 + 270 = 855. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 54 × 21 = 1134. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 27 × 54 = 1458. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 992 + 614 = 1606. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 31 × 94 = 2914. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 54 × 52 = 2808. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 60 × 65 = 3900. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 895 + 571 = 1466. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 788 + 170 = 958. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 15 × 16 = 234. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 450 + 618 = 1063. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 48 × 42 = 2010. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 44 × 55 = 2420. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 58 × 53 = 3074. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 60 × 17 = 1020. Correct or wrong? (a) correct (b) wrong

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