1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 166 · 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.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 689. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.594 + 495 =
6. 6.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.891 + 198 =
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 987. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.396 + 693 =
27. 27.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.297 + 792 =
34. 34.198 + 891 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 668. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?

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