Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 262 · 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: 486 + 296 = 778. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 90 × 29 = 2613. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 567 + 716 = 1283. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 93 × 27 = 2518. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 17 × 97 = 1649. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 62 × 32 = 1977. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 69 × 29 = 2001. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 57 × 68 = 3876. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 30 × 88 = 2640. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 160 + 658 = 818. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 76 × 20 = 1520. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 82 × 15 = 1230. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 741 + 325 = 1066. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 228 + 678 = 910. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 74 × 96 = 7107. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 130 + 185 = 315. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 61 × 62 = 3786. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 53 × 67 = 3550. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 917 + 409 = 1329. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 84 × 35 = 2945. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 57 × 14 = 798. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 297 + 161 = 456. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 52 × 99 = 5144. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 13 × 44 = 572. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 35 × 29 = 1020. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 13 × 25 = 325. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 250 + 130 = 380. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 41 × 98 = 4018. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 99 × 63 = 6237. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 547 + 185 = 732. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 32 × 17 = 544. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 27 × 63 = 1693. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 53 × 12 = 636. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 520 + 701 = 1221. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 75 × 21 = 1575. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 580 + 331 = 917. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 747 + 220 = 967. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 258 + 132 = 390. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 31 × 14 = 439. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 25 × 61 = 1524. Correct or wrong? (a) correct (b) wrong

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