1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 373 · 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 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.891 + 198 =
7. 7.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 240. 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 5. What is that number?
12. 12.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.693 + 396 =
16. 16.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.792 + 297 =
20. 20.594 + 495 =
21. 21.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
25. 25.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 399: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 287: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.297 + 792 =
38. 38.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.396 + 693 =

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