1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 184 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 165: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 358: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.396 + 693 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.Take 448. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 438: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.594 + 495 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.792 + 297 =
23. 23.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.Take 854. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 244. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.891 + 198 =
33. 33.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.495 + 594 =
37. 37.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.198 + 891 =

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