1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 679 · 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 763: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.495 + 594 =
6. 6.297 + 792 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Do the 1089 trick with 248: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Do the 1089 trick with 683: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.891 + 198 =
19. 19.396 + 693 =
20. 20.Do the 1089 trick with 557: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.198 + 891 =
25. 25.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 214: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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